Best Hot Tub & Whirlpool Baths Filters

Compare Best Ranked Hot Tub & Whirlpool Baths Filters

We’ve reviewed some top rated of the best-selling hot tubs, spas & pools filters and accessories. Compare quality hot tubs filters and their features. Here you can find and compare specifications of the best water care products with the highest rated customer reviews.

Let’s review our top picks!

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2 Guardian Pool Spa Filter Replaces Unicel C-4326 Spa Filter FC2375 Pleatco...

Made in the USA New in Factory Packaging Replaces the following: Fits: Rainbow Dynamic 25; Sundance Sweetwater: Suntub, 6540-471; Freedom Spas: After 1993; Hydrowave Spas: Stressbuster; Waterway: ...

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$34.72 49.99
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Perfect fit for my newly acquired, gently used spa. I wanted fresh filters since the one the spa came with was the original.
September 22, 2017
Great replacement for my spa filter - at about half the cost of my local spa dealer.
October 13, 2017
Work great for me for my Royal Spa "The Royal Model" Been swapping them back and forth and cleaning them for a while now. Fixing to order again hope they work out for another two years.
March 8, 2017
These fit and worked as good or better than what we had.
July 5, 2017
Works perfect at half the price from your local spa store.
October 11, 2016
Fits well. Filters are doing the job
October 2, 2017
It's a filter. It does what it should. Two pack is nice for alternating between cleaning.
August 11, 2017
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2 Pack - New Spa Filter Cartridges Fit: UNICEL 6CH-940--FILBUR FC-0359--Pleatco PWW50P3

Also replaces the following filters:Pleatco: PWW50P3 | Unicel: 6CH-940 | Filbur: FC-0359 Alternate Filter Names: 03FIL1400 | 25252 | 378902 | 817-0050 | 817-0500 | 17-175-1749 | 25252-800 | X268045 | ...

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$48.23
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These correctly fit my Jacuzzi by Imperial Spas hot tub. I ordered incorrect ones before not realizing that not only are there the different size of opening but also two different common thread pitches. This filter sports the finer thread pitch of the two.
September 11, 2017
Haven't put them on yet but they look like the set I have and cheaper.
March 2, 2017
Perfect... just what I needed.
October 23, 2017
Product was as described
July 12, 2017
Worked perfectly
August 25, 2017
Filter fit perfect and works well in our hot tub.
November 6, 2017
Works just as good as the ones that you pay for a lot more in the SPA type supply stores
April 29, 2017
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Zodiac W20750 Nature2 SPA Stick Mineral Sanitizer

Enter your model number to make sure this fits.; Mineral cartridge W20750 for hot tubs and spas; The only EPA-approved no-chlorine or bromine sanitizer system when used with Nature2 Cense; Fits ...

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$23.85 34.08
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I have this rigged in my Intex PureSpa and it seems to be working well. I hardly add any chlorine now, just a little every few days, water is super clear. It doesn't fit in the Intex filters so I just used a zip tie to attach it to the water inlet jet so the water is always flowing through it.
March 1, 2015
works AWESOME Used in softub and then add a tsp of oxidizer after each use. I blast with chlorine every month or so, but otherwise, it is very very low chem solution for your spa. I totally feel like this makes spa use do-able in a low or NO chemical environment. I will buy again unless I can find a lower cost alternative.
November 9, 2015
I love this! No more chemical odors and very easy to use.We are getting ready to drain our tub and replace our first Nature2 Spa Stick - but this time we are doing it because it is time to - not because the water is icky. In fact the water is still clear and fresh smelling. LOVE THIS!Nature2 Spa Stick Mineral Sanitizer
December 4, 2016
Bought one of these to try on my Jacuzzi tub, if you swap the top pieces with your old ProClear it fits right into the filter cap, you can also just pour the stuff into your old Jacuzzi ProClear housing. Anyway, it worked for my J425 tub and I saved a few bucks 😀
April 5, 2017
I've been running the Nature II system in our hot tub this year and really love it. I recently had to repair a leak in our tub and decided to start fresh when I had to refill it. Even though I probably didn't need to replace the old stick, the price on this one was so good, it made the decision a lot easier.
October 25, 2016
I was skeptical about using this instead of a bromine floater in my spa, but it works. I shock my spa once a week using a dichlor product (usually Clorox. I've had it for about two months now and my spa stays clean.
June 1, 2016
I really wanted to like this product, but It just didn't work. I bought the correct test strips and the chlorine free shock powder. Though I adjusted for PH I was never able to get the MPS levels to register, meanwhile, the pool got very cloudy and started to turn green. As soon as I returned to using chlorine again it perked right up.
November 14, 2017
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FIT: Pool/spa (2) Pack C4950 UNICEL C-4950 PLEATCO PRB50-IN FC-2390

Made in the USA New in Factory Packaging (2) Pack Replaces the following: -Beachcombers Spas - OEM part number 3005815 -Bull Frogs Spas - OEM part number PR. Top Load -Cal Spas - OEM part number ...

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$40.00
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Bought these as an alternate for the Unicel previously fitted to my hot tub. Did not fit on 1st attempt and on investigation the bottom end cap was molded off center (see bottom center of photo) which took 15 min with a file to correct. Not something you should have to do. Contacted the supplier who told me they ship 5-6k per month and have never seen this. Guess I'm just lucky? They offered me $5 for my trouble, no option offered to replace or refund. I'm very happy for those 81% 5 Stars who have had no issue, but be warned, if you get a dud don't expect a refund!!!!!
April 16, 2017
These are the 2nd set of these I bought - work fine and fit correctly and a great price
August 7, 2017
These filters are very poorly made. This is the second time I've ordered them and I will never again. The first time one of the filters was cracked. I didn't complain and gave the company the benefit of the doubt. I just received my package today and again one of the filters is cracked in the same exact spot as my last set.
June 28, 2017
Fit my spa perfectly and perform as well as the original filter for far less money.
April 12, 2017
Just as good as the ones that came with my spa
November 4, 2017
Works great, saves us money! Win Win
September 11, 2017
Great filter and the price was perfect.
May 30, 2017
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Pleatco PWK30 Replacement Cartridge for Watkins Hot Spring Spas, 1 Cartridge

Not just a Filter Cartridge. Pleatco is a complete Filtration System! Pleatco Free Flow Cores, REEMAY Filtration Fabric, Antimicrobial Endcaps and Superbond Bands make the Pleatco product compass to ...

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$11.98
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I bought these 2 years ago for my Hot Springs tub to replace the cracked ceramic filters that I bought before (a huge disappointment!). I was prepared to be disappointed by these filters but thought I would try them because they cost much less than the original filters. To my happy surprise, they have worked perfectly for 2 years and just now need replacing. On another note, I ditched the chemicals about 7 years ago and have been using an enzyme treatment from clearchoicespa.com. It has worked very well. No more billowing cloud of chemicals when I turn on the jets!
May 8, 2017
If you are looking for a "flimsy cheap filter" you have found it! I installed these in my Grandee hot tub because I thought I needed to replace my original ones and didn't want to spend a lot of money. I was shocked when I picked up the box they arrived in. "Very light"!Fast forward 2 months! They caused my hot tub to stop heating the water because they restricted the flow. Think of it like this: Charmin toilet paper is like the Watkins brand, the generic toilet paper like these.......
November 25, 2014
My original filters finally needed to be replaced and I couldn't see paying the high prices from the manufacture or the local spa stores. The measurements are a near perfect match and when I placed them side by side you couldn't notice a size difference at all.The filters are nicely built and the pleating is very consistently spaced around the whole filter.Bottom Line: I have crystal clear water at a fraction of the filter price of the local stores or the manufacture.Please feel free to ask any questions about my review in the comment section and I will try to quickly respond. I hope my review has been supportive, enlightening, or most importantly helpful to you. My goal is to continue to be helpful to other Amazon shoppers in making informed purchasing decisions in the sea of choices available.Thank you for taking the time and reading my review!
May 16, 2016
Thanks goodness for these filters. I know that I had stayed with the old ceramic filters for a couple of seasons too long. These new filters are taking everything out of the water. My water is crystal clear. I'm loving it.
August 17, 2017
Not sure how to review this. It fits and it filters, which is what I wanted it to do. I'm happy. It replaced one that was several years old, so if it falls apart in a year, I would change my mind, but that's not likely to happen.
May 3, 2017
These SPA filters have proven to be a good bargain- much less expensive than the ones at the pool store, and function just as well.I just cleaned my SPA, and they look great! Water has been crystal clear.If you have a Hot Springs Spa, I reccommend these filters.
July 12, 2009
Worked perfect as a replacement in our Hot Springs hot tub. No issues with the saltwater sanitizer system using these filters and much less expensive the the others.
November 14, 2017
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2 pak-filter replaces- PLEATCO PDM25P4 DREAM MAKER GATSBY SPA unicel 4CH-21, HOT...

Pleatco: PTL18P4-4 | Unicel: 4CH-21 | Filbur: FC-0121 Diameter: 4 5/8" Length: 8" Top: Handle Bottom: 1 1/2" MPT male Threaded Filter Area: 20 sq ft Filter Material: Reemay 3 oz. Alternate Filter ...

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$32.65
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These are exactly what was needed for our spa..fit well and there delivery was a snap..highly recommend these filters.
March 7, 2017
Glad to have these filters. They are a bit shorter than my original ones but work fine
April 20, 2017
Oops, wrong size. Got here fast tho 🙂
July 7, 2017
Long lasting hot tub filters. Half the price of buying through my spa maintenance company.
July 16, 2017
Good price on these items. Will definately purchase again! Always very great experience when buying from the Spa Depot. I have an Dream makers eclipse spa & I find that items for this are hard to find
June 22, 2015
The filter did not work in my spa as it was supposed to.I had to order Pleatco PDM25P4 filters to work properly.
November 30, 2015
Fit like a glove and my hot tub is now useable again!
November 3, 2017
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Pleatco PRB50-IN Spa Pool Filter, 1 Cartridge

Not just a Filter Cartridge. Pleatco is a complete Filtration System! Pleatco Free Flow Cores, REEMAY Filtration Fabric, Antimicrobial Endcaps and Superbond Bands make the Pleatco product compass to ...

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$22.40 34
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My hot tub was given to me and before I got my hands on it, it was left alone and empty except for rain water and trash that sat in the bottom. Cleaning out the lines was extremely hard and time consuming. There was no way that I could clean it all out. This filter was one of the cheaper ones that I found on Amazon, so I figured that I would be replacing it soon. However I was wrong. In a matter of a week my spa was crystal clear and running perfectly. Every week I take it out and clean it and it looks brand new after every cleaning. It has been a month now and I know I should replace it soon, but it still works like it is brand new. I am ordering a few as back ups and I deffinately will replace in a month or so, but right now I am enjoying a beautiful crystal cleat spa and I have to note that I have four teenagers. three of them boys and there is a lot of traffic almost daily from several people.
July 13, 2014
Arrived broken on the top and possibly used. Caused the chemicals to become difficult to level. Took this one out and replaced it with another new one bought from the spa store locally and it cleared everything up.
October 5, 2017
Don't bother with the other brands - this filter does the job for half the price. Buy some spares so your tub is always ready to run while you clean (or toss) the old filter.
April 24, 2017
I mean spa store. Look, I don't have anything against someone making a buck, and selling accessories is high margin stuff. But when the local shop is charging twice as much for the same exact product, they are just taking advantage of people. This filter is the same dimensions, and probably made in the same factory under a couple of different names, but really, it's just a hot tub filter. Nothing fancy. Amazon has a great price on it, shipped quickly as usual, and was half the price- way to go!!
May 1, 2013
Replaced existing filter with this one and it works far better. The interior configuration appears to be more efficient. My waterfall no longer becomes clogged.
August 1, 2017
These are just the right size and perform well for my 10 year old Phoenix Spa.
August 17, 2017
The filter was exactly what was described and the packaging was perfect.
May 30, 2017
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INTEX 29001E PureSpa Type S1 Easy Set Pool Filter Cartridges, 6 Filters

Buy together and save - three pairs of INTEX type s1 spa filter cartridges (six cartridges). Give your INTEX pure spa it's best performance by using genuine INTEX brand, easy to clean, Dacron filter ...

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$16.99
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I Have an Intex Hot Tub and this is where I come to get all my filters for it! I love the quality and price of what I’m getting. Thee are the real deal for your Intex Type S1. This will last me 3 months on average. These are very easy to clean once a week. Then Replace once a month with a fresh set. I get way less Errors for filter on my hot tub when using this brand.These seam like they were of better quality then the filters that came with the hot tub. I defiantly get my monies worth using these when the others only last half the time.Please check out my before and after photos of the filters.
July 17, 2016
We have very rusty water where we live and these filters with the low flow pump took about a day and half to clear up the rust in the water and I was able to re-use them. Although I can't say it is a defect in the design, cleaning them with the hose is a bit messy, but it works. The other option that I have done was to use a filter cleaner and soak them over night. I did that last year and the filters lasted the entire year. When they get dirty, the flow is reduced considerably. They seem to be well made and filter well when taken care of.
July 7, 2017
These are the same ones that Wally Mart sells and you don't have to deal with Wally Mart. Better price as well.
November 12, 2017
These are not an exact fit. You have to really work at it to get the cover over them.
October 14, 2017
Great quality, I actually ordered the wrong size but trimmed up the inside hole and made it work for my Coleman lazy spa. They work great.I will be ordering again, the correct size of course.
May 7, 2017
Arrived on time - what can I say, they're filters and they're the correct ones. Couldn't be happier!
May 27, 2017
great soltuion for the hottub. the fins are much closer together than those you might find in walmart or local department stores. so what you may ask... we it provides more surface area for the fins to catch particulates. I found that i was able to clear the water much faster with these filters than the disount store ones.
February 18, 2015
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3-Pack Guardian Pool/Spa Filters • Replaces Watkins Hot Springs, Unicel C-6430, Pleatco...

New in factory packaging- 3-Pack Guardian Filtration Products Filter Cartridges Replaces: Unicel C-6430 • Pleatco PWK30 • Filbur FC-3915 Also replaces the following: Watkins 30 / Hot Springs - OEM ...

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$49.47
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Shipped quickly, very happy with purchase, had 2 jets that were not working properly but they are now, produced more power
May 6, 2017
What a great price for these. Where I live the pool/spa places wanted more than the price of these 3 for just one filter. Definitely a great find here
March 5, 2017
It fit our 15 year old Prodigy model spa perfectly.
October 14, 2017
Nice filter with long life if cleaned on regular bases. We use Spa every day and we only change theses once a year. Adam A we clean once a month with a garden hose spray you can also get a chemical cleaner from your supplier for cleaning. Our filter get changed every year and we use our spa every night.
January 18, 2016
This are the most amazing filters. They have changed my life in so many ways. I do not know how I ever survived without them.
March 11, 2017
..but crummy packaging. Three layers of cellophane wrapped so tightly that it was hard to get them unwrapped. The tightness of the wrapping smushed the ribs of the filters, and they were squeezed so tightly together that the blue plastic tops and bottoms warped, however neither of these things affect the way they work, so I can only call it an observation instead of a complaint. Bottom line is, it's a great deal for 3 of them.
October 28, 2013
These fit and work wonderfully! And a great price.
April 22, 2017
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Filbur FC-0359 Antimicrobial Replacement Filter Cartridge for Select Pool and Spa Filter

Cartridges are produced with genuine Reemay filter media and durable polyurethane end caps. Prevents harmful bacteria from growing on the cartridge. Less bacteria results in a reduction of foul ...

Available: In stock
$28.15 37.25
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Purchased to replace unknown brand filters that came with my hot tub with same part number on them (originals were green plastic, not blue like these) were easy to install an appear to be working as expected 🙂
July 1, 2017
For years I've purchased filters from my spa manufacturer, but thought I'd save money by purchasing from Amazon. Well, I got what I paid for! These filters are far less efficient than what I've been using. These filters clog up quicker ... so bad that it causes my spa to shut down because of restricted water flow. With these filters, I struggle to keep the water bright and clear. They simply are inefficient and have cost me more money in the long run.
February 20, 2017
There isn't much to say about this except that it was the correct filter for the hot tub. The construction appears to be sound; we haven't used it yet. Purchasers of filters should pay close attention to the size specified so as to insure that a purchased filter will fit.
October 5, 2016
Exactly what I needed and at half of the price I have paid locally.
July 10, 2014
As represented, came quick, fit perfect.
August 31, 2017
This is the lowest priced filter I have ever purchased for my HotTub, the quality appears to be working as well as filters I have cost me twice as much. I plan to order all my filters from this seller in the future as long as they continue offering similar low prices for these filters.
May 9, 2014
This filter fit perfect and did an excellent job cleaning up the hot tub
October 30, 2016
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Pool/Spa Filter Cartridge Pleatco PRB25-IN Replaces Unicel C-4326/Filbur FC-2375/Rainbow Dynamic 25

Not just a Filter Cartridge. Pleatco is a complete Filtration System! Pleatco Free Flow Cores, REEMAY Filtration Fabric, Antimicrobial Endcaps and Superbond Bands make the Pleatco product compass to ...

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$22.00
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This is the Pleatco PRB25 filter. Please be aware that the 25 in the model number stands for 25 square feet of filter material. Pleatco also makes similar filters with the same length and diameter, but they have 50 square feet of filter material (and have "50" in the model number).I wasn't sure whether to purchase the 25 or the 50 but opted for the 25 because I didn't feel the need for the 25 additional square feet of filter material (and the filter media fabric is the same either way, about 3oz/yard). I've used 50 sq ft models in the past and found that the filter was more difficult to clean because there was so much filter fabric that the pleats were very tight together. What most often gets cleaned by my hot tub filter are pieces of grass, hair, dirt, and bird seed shells. Either the 25 or the 50 would catch this material. Perhaps it helps my tub's pump that there is less back pressure from the 25 filter, but it may not make much difference either way.Pleatco makes a good filter and there are many companies who charge more for this same filter. The 25 is sometimes slightly less costly than the 50. After a while the filters start to get a bit grungy so I replace them about annually. If this filter's length and diameter fits your tub/spa/pool, then either the 25 or the 50 should work well for you.
January 2, 2011
We have used these filters for years and we're happy to find them on Amazon for a much lower price. We do clean them for reuse, which does involve a little time and a cleaner. The filter material is now some sort of fabric vs paper and it is easier to clean and more durable.
April 25, 2017
I ordered this product after careful measurement of O/D, I/D, and height of my old filter. Our spa is 8 years old. Original filter no longer available so many possible replacement filters exists. This one has now been in place for several months and is doing a great filtration job. No complaints.
August 24, 2012
These things work but clog fast and their so cheap your better off buying more then cleaning it and going green recycling
September 15, 2017
This is used for me as a replacement filter for a Cal Spa's "Atlantic" model. I try and hose it out about once a week and they last about year. Quality manufacture and have purchased several over the past few years.
October 12, 2015
Bad product doesn't come close to quality of old filter
July 3, 2017
Works just as needed. Great for my hot tub... last about 4 months.
April 20, 2017
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Unicel 4CH-940-2 Replacement Filter Cartridge (2 Pack)

45 sq. Ft. Top load. Replacement for: American spas; Catalina spas; charisma spas; Clearwater spas; Dakota spas; leisure Bay spas; millennium spas; Phoenix spas (note: two 50 sq. Ft. Cartridges ...

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$48.99
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As far as I know this is the top name in spa and pool filters. I have used them for many years and have always had good results. THey do not ever fall apart in any way and are 1 piece construction made just for my spa model. I have used other cheaper ones and some will have two pieces and they are no good. on the other hand I have used a lower priced option purchased here on Amazon and I really can't tell the difference between them other than the name. I have been the owner of my spa for 15 long happy years and only need to change the filters once a year unless I have a big party and people spill drinks in the water. Unicel is the OEM filter supplier for my hot tub.
November 21, 2014
OEM - Perfect replacement for my spa filters. Price was a little higher. I have replacement non OEM and they have fewer screw threads in the bottom of the filter.
April 10, 2017
This filter was an exact OEM with my installed Spa. The original lasted over 28 months without problems, The cost was 1/2 the price offered out in town or at my Spa Dealership, I was amazed! Amazon shipped the same day and I had the filters 2 days later, properly packaged and undamaged. I am very pleased with this purchase...
January 2, 2014
Fit perfectly!
August 2, 2017
Quick,price great.
March 24, 2017
Perfect fit and easy install. As good as oem. Fast shipping as well. Just use the dimensions provided and take a minute to measure yours. If the match, these are a win.
December 24, 2015
This product looks great. Price is reasonable and I would recommend it for those who like to change their spa filter regulary
December 25, 2012
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2 Pack Filter fits- Pleatco PAS35P Fits Coleman Elite Spa Filter Cartridge...

PAS35P, 5CH-35, FC-0300 Replacement Cartridge Measurements: Diameter: 5 7/8" Length: 7 3/4" Top Hole Dimension: Handle Bottom Hole Dimension: 1 1/2" MPT (Male Pipe Thread) Replaces: Unicel 5CH-35, ...

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$46.00
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I'm very pleased with these filters. I have a Maxx Elite Spa which uses two of these filters. I use two sets of filters; one is in-use while the other set is a spare set. When the filters get dirty and need to be changed, I put the spare set in and hose off and soak the dirty filters in 'Filter Clean' solution overnight and then hose them off and store them as the spare set. I liked these filters so much, I ordered another set so both in-use/spare sets are the same age. These filters are superior in design and function to the ones I've gotten in the past and fit perfectly and screwed in 'tight' in the filter holes. Very pleased with these.
July 29, 2015
Direct fit for my MAXX Spa. Second time replacing, happy with quality, fast shipping.
August 28, 2017
Good filters, but they're not Pleatco! My old filters have the raised "Pleatco" name on them.
January 24, 2017
Excellent fit perfectly
October 1, 2017
FiT my LA Spa hotub. Works as expected. Well made.
August 30, 2016
I bought these to replace my way too old filters. The quality seems better than the name brand they replaced. I've had them in for about a month and have cleaned them once. So far so good. I will order again.
August 7, 2017
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SINGLE pak-filter replaces- PLEATCO PDM25P4 DREAM MAKER GATSBY SPA unicel 4CH-21, HOT...

Guardian Spa Filter - 4CH-21 - Replacement Filter 20 sq/ ft. 4CH-21 Replacement Filter 20 sq ft. Guardian Pool Filter Replaces Unicel 4CH-21, Pleatco PTL18P4-4, Filbur FC-0121 Filter Cartridge for ...

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$18.99
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Fit my dreamaker round spa perfectly. Fixed a lot of my water quality problems.
October 6, 2017
Fits the dream maker Trident/Fantasy spa great.
September 8, 2017
like it
November 5, 2017
Great price and delivery was on time
October 23, 2017
works
April 12, 2017
It was perfect for my Hot Tub
September 7, 2017
Seemed like a quality product, but the actual specs of the filter did not match the product description.
September 7, 2015
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Unicel 5CH-352 Replacement Filter Cartridge for 35 Square Foot Marquis Spa, New...

35 Square Foot Marquis Spa (new style). Replacement for: Marquis Spas 20042; Unicel 35 Square Foot top load (Note: Replacement for Marquis Spas.); Marquis Spas 370-0242; Marquis Spas 370-0243

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$28.99
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Used to replace the brand name filters in a Marquis spa. Works perfectly and have had them in there for 4 months already. No sense in paying for a more expensive product when you can get an identical filter that will work just as well.
December 14, 2016
Dose a great job
July 5, 2017
Fit perfect
April 18, 2017
The product is perfect - gave it three stars because it took two full months to receive 4 filters. So if you're in a hurry, check the estimated ship time before you buy.
November 30, 2016
Perfect fit
September 18, 2017
This delivery arrived in the day the tracking said it would. Works perfectly. Thank you.
January 30, 2017
What can you say about a filter? It's cylinderical, it fits my tub and appears to do the job.
June 5, 2016
3 Comments
  1. Reply
    finn September 10, 2017 at 9:08 pm

    These, INTEX 29001E PureSpa Type S1, look like the same ones that I use in my intex pool. I wonder if they will work in my spa. Thanks for the heads up!

  2. Reply
    Janette November 1, 2017 at 6:05 pm

    Awesome! I have been looking for a place to see all the filters at one time. Thanks!

  3. Reply
    david s November 21, 2017 at 10:06 pm

    So many different styles to go with. How is the heck I supposed to know which one is for my hot tub? It is about 10 years old now and I cannot figure out what model number it is.

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