Get the Canopy Bath Tub Filter (10.0): its maker states NSF/ANSI 177 testing for the cartridge. Two or three baths a week? The Crystal Quest Bath Ball (8.6) goes longest between cartridges.
Top pick: Canopy Bath Tub Filter$89.00 at AmazonPrice as of Oct 24, 2026, 5:30 AM EDT
All three hang on or fit over a tub spout and filter the water as the tub fills. Each was new and in stock on Amazon on Oct 24, 2026. I’ve used these picks.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
When will each cartridge need changing?
Enter how often you bathe and how much water a bath uses. The planner applies each maker’s rated cartridge life.
The three makers rate their cartridges three different ways. Crystal Quest gives a range in gallons and a range in months, so whichever you reach first is your replacement date. Canopy gives a fixed 90 days. Sprite counts baths, roughly 30 per cartridge.
So the filter that needs the fewest cartridges depends on how you bathe. Someone who bathes twice a week goes a long time on a Sprite or Crystal Quest cartridge. In a household with a full-tub bath every day, Canopy’s fixed 90 days is the longest interval, because Crystal Quest’s gallon limit arrives first.
PlumbingPicks spec score out of 10, from Canopy, Crystal Quest and Sprite product and warranty pages, read Oct 24, 2026. It is not a customer rating or our own test.
Cartridge doesn’t fit Canopy’s shower or faucet filters
3 x 7 x 7 in.1.5 lbBPA-free silicone90-day cartridge1-year warranty
Buy it if
You want the one pick whose maker states NSF/ANSI 177 testing, and a soft spout cover is a bonus for a small child’s bath.
Skip it if
You take two or three full baths a week. Crystal Quest’s gallon-rated cartridge lasts longer at that pace.
The Canopy Bath Tub Filter is the bath filter I’d buy first, and I’ve used it. It scored a full 10.0, passing all seven checks.
It’s the only pick whose maker states NSF/ANSI 177 testing for the product itself. Canopy’s details list says the replacement cartridge is tested to ANSI/NSF-177 standards. Sprite says most of its products are certified to that shower filtration standard, but not the bath filter specifically, and Crystal Quest doesn’t mention it.
Canopy names three filtering media: granular activated carbon, copper-zinc and calcium sulfite. Its page describes the copper-zinc as KDF-55. It says the media are known to reduce chlorine and other impurities in tap water, and it says to replace the cartridge every 90 days.
The body is BPA-free silicone and measures 3 in. wide by 7 in. tall by 7 in. long, at 1.5 lb. It doubles as a spout cover, which Canopy says protects against bumps, and it has a color-changing temperature indicator. Treat that as a guide and still test the water by hand before a child gets in.
Fitting it is simple. You choose an attachment band that matches your spout size, slide it onto the spout with the tab facing the wall, then press the cover over the band. Canopy says it’s designed for bath tubs only and that the cartridge doesn’t fit its showerheads or faucet filter.
Canopy lists a one-year warranty for all customers and 60-day returns in the U.S. Its replacement cartridge is sold on Amazon by Canopy (B0FLMNZ21N).
Canopy markets it for baby baths and cites a parent survey on its page. I haven’t scored that, and nothing here is a health claim: it’s a filter for bath water that its maker had tested against a shower filter standard. Canopy sold the listing itself on Oct 24, 2026.
2,000 to 2,500 gallons or 12 to 18 months per cartridge
Standard and flexible handles, plus a hook
ABS housing, BPA-free
Five housing colors
Cons
No NSF/ANSI 177 testing stated
Long removal list with no certification behind it
Warranty excludes cartridges
5 x 5 in.2 lbABS4 to 5 gpmCQE-RC-04052 cartridge
Buy it if
You take two or three full baths a week, so Crystal Quest’s 2,000 to 2,500 gallons stretch furthest, on a filter that hangs from almost any spout.
Skip it if
You want NSF/ANSI 177 testing stated for the product. Canopy is the pick that states it.
The Bath Ball is Crystal Quest’s tub filter, and I’ve used it. It scored 8.6.
At light use its cartridge lasts the longest of the three. Crystal Quest rates it for 12 to 18 months or 2,000 to 2,500 gallons of filtration, and sells the replacement as CQE-RC-04052. Gallons are usually the limit: at 40 gallons a bath, 2,000 gallons is 50 baths, so a daily full-tub bather reaches it in under two months. Its recommended flow rate is 4 to 5 gallons per minute.
The housing is ABS plastic, BPA-free, measuring 5 x 5 in. and weighing 2 lb. Crystal Quest says it installs without tools on standard tub faucets and ships with both a standard and a flexible handle. For the faucets those don’t fit, it sells a Bath Ball hook.
Crystal Quest says the water passes through stages of its ERA 6500 and ERA 9500 media, and it publishes a long list of what it says the filter removes. None of that list is backed by a certification on the product page, so treat it as the maker’s claim. That’s the one check it failed.
The page carries two practical notes. Hard water can damage the coating on the chrome version, so Crystal Quest suggests wiping it after each use or choosing white. And with infrequent use, bacteria can grow on or inside the housing; it says to clean it with hydrogen peroxide or mild dish detergent.
Crystal Quest’s warranty covers its filter systems for one year from purchase against defects in materials and workmanship, but excludes replacement filters, and you need an RMA number before sending anything back.
Crystal Quest sells the cartridge on its own site as a one-off order or on a repeat schedule from every 3 to every 18 months. Pick the interval the planner gives for your household. Set a reminder either way, because nothing on the ball tells you the cartridge is spent.
Crystal Quest sold the white listing itself on Oct 24, 2026; it also lists chrome, black, pink and blue housings.
Best for an occasional bath
Sprite Showers Bath Pure bath filter, BB-WH, white
You take a bath now and then, so a 30-bath cartridge lasts months, and you want a light filter that straps to the spout.
Skip it if
You bathe daily. Thirty baths is about a month of daily use; Canopy’s 90-day cartridge lasts longer at that pace.
Bath Pure is Sprite Industries’ bath filter, and I’ve used it. It scored 7.1.
Sprite says it neutralizes free chlorine, dirt and odors in bath water. The housing is ABS food grade plastic, and a universal detachable harness connects it to most fixtures: you set the ball under the spout and secure the velcro harness before running the water.
Its replaceable BBC cartridge is rated for approximately 30 baths, the shortest life here if you bathe often and the most forgiving if you don’t. At 1 lb it’s the lightest pick, half the Crystal Quest’s weight.
Two checks failed. Sprite’s Bath Pure page doesn’t name the filter media, and while Sprite says most of its products are certified to NSF standard 177 for shower filtration, it doesn’t say the Bath Pure is one of them. I scored only what the page says about this model.
Sprite’s warranty covers plastic filter housings for one year against defects. It covers the housing only, not the cartridge, and Sprite asks owners to submit the warranty information within 15 days of purchase.
Sprite lists Bath Pure in chrome, transparent blue, white and clear. The white BB-WH and the BBC cartridge (B013GWV41C) were both sold by Amazon.com on Oct 24, 2026.
Sprite also sells Dechlorinating Bath Salts made with its Crystal-Chlorgon, a 40 oz pack it rates at approximately 25 to 30 baths, which neutralize chlorine in the water without a filter. That’s a different product and isn’t scored here, but it’s an option for a tub where nothing will hang off the spout.
Of the three, the Bath Pure has the simplest fitting: no bands to size and no handle to choose, just a strap around the spout. That suits a guest bathroom or a rental, where you want it on and off in seconds.
If you also want filtered showers, Sprite is mainly a shower filter maker; its shower filters are covered on the best shower head filter page.
Sources: Canopy Bath Tub Filter product page; Crystal Quest Bath Ball product and warranty pages; Sprite Bath Pure, bath filters and warranty pages.
Checked and left out
Filter
Why it’s not a pick
Shllkttry, JUSTOWE, JDO, QMKGEC and similar
Store brands with stage counts and gallon claims in the listing but no maker documents to check them against.
Santevia organic cotton bath faucet filter
Santevia’s product page returned a 404, so I couldn’t check the listing.
Rainshowr Bath Ball 3000
The maker’s site didn’t load, so I couldn’t check the listing.
Vitamin C shower filters (Aquabliss and others)
Shower filters, a different product from a tub filter.
What a bathtub filter does, and what it doesn’t
Question
What the makers say
Chlorine
Canopy and Sprite both name chlorine; Crystal Quest lists chlorine and chloramines among many others
NSF/ANSI 177 testing stated
Only Canopy states it for its bath product
Drinking water
None of these is a drinking water filter
Hard water
None claims to soften water; Crystal Quest warns hard water can damage its chrome finish
Health claims
I don’t score or repeat them
A tub filter sits under the spout and the water runs through a cartridge on its way into the tub. That’s it. It doesn’t treat the rest of the house, it doesn’t make water safe to drink, and it doesn’t remove hardness minerals.
If you want every tap treated, that’s a whole house system; see best whole house water filter. For hard water, a softener does a different job from a carbon filter.
Bath filter or shower filter?
Tub filter
Shower filter
Where it goes
On or under the tub spout
Between the shower arm and head, or built into the head
Water it treats
Only what fills the tub
Only what comes out of the showerhead
Flow
Crystal Quest rates 4 to 5 gpm
Limited by the showerhead
Standard cited
Canopy: NSF/ANSI 177
Sprite: NSF/ANSI 177 for most models
Who needs it
People who mostly take baths
People who mostly shower
A tub filter and a shower filter do the same kind of job at different outlets. If your household mostly showers, a tub filter does little; put the money into a shower filter instead. If small children get baths every night, the tub is where the water goes, so a tub filter is the one that treats it.
Canopy and Sprite each make shower filters too, but the cartridges don’t swap: Canopy says its bath cartridge doesn’t fit its showerheads.
What “tested to NSF/ANSI 177” means here
Maker
Exact wording on its page
Canopy
Replacement cartridge “tested to ANSI/NSF-177 standards”
Sprite
“Most Sprite products are certified to NSF standard #177 for shower filtration”
Crystal Quest
No NSF/ANSI 177 statement on the Bath Ball page
NSF/ANSI 177 is the standard Sprite describes as being for shower filtration, and a bath filter is close kin to a shower filter. The wording matters, though. “Tested to” a standard and “certified to” it aren’t the same claim, and a brand-wide statement doesn’t cover every model.
That’s why the score has a separate check for a 177 statement about the product itself. Canopy passes it. Sprite’s statement is about its range in general, so the Bath Pure doesn’t. Crystal Quest doesn’t make one.
Canopy names all three of its media and says they’re known to reduce chlorine and other impurities. Crystal Quest names its own ERA media. Sprite’s bath page doesn’t say what’s in the BBC cartridge, which is why it lost that check.
Will it fit your tub spout?
Pick
How it attaches
Fit notes from the maker
Canopy
Attachment band slid onto the spout, cover pressed over it
Choose the band that matches your spout size; tab faces the wall
Crystal Quest
Hangs from a standard or flexible handle
A Bath Ball hook for faucets the handles don’t fit
Sprite
Universal detachable velcro harness
Connects to most fixtures, per Sprite
Tub spouts come in many shapes, and a filter that hangs off the end needs something to grip. Look at your spout before you buy: a short, round spout suits all three, while a long or flat-fronted spout may need Crystal Quest’s hook or a different band size from Canopy. If your spout has a diverter knob on the end, the filter has to clear it.
Buy the cartridge from the same maker as the housing. Amazon lists “compatible” Canopy and Crystal Quest cartridges from other sellers; those don’t carry the maker’s stated testing or warranty. The planner above turns each rating into a date for your household.
Which of the three fits your bathroom?
If you…
Pick
Why
Want NSF/ANSI 177 testing stated for the product
Canopy
Only maker that states NSF/ANSI 177 testing for its bath cartridge
Take two or three full baths a week
Crystal Quest
2,000 to 2,500 gallons or 12 to 18 months stretches furthest at light use
Bathe daily in a full tub
Canopy
A fixed 90 days outlasts Crystal Quest’s gallon limit at that pace
Take a bath now and then
Sprite
About 30 baths per cartridge, so it lasts months
Have a long or odd-shaped spout
Crystal Quest or Sprite
Hook option, or a strap that wraps any spout
Bathe small children
Canopy
Soft spout cover and temperature indicator
Start from how your household uses the tub. The scores rank how fully each maker documents its filter, but the right pick also depends on bath frequency and on your spout. Run your numbers through the planner before you decide; the answer changes a lot between two baths a week and seven.
Setting up a bath filter the first time
1
Check the spout
Note its length, shape and any diverter knob on the end.
2
Fit the mount
Canopy band, Crystal Quest handle or hook, or Sprite’s strap.
3
Seat the cartridge
Canopy ships with the cartridge inside; check the others before first use.
4
Run it
Fill the tub at your normal flow; Crystal Quest recommends 4 to 5 gpm.
5
Note the date
Write down the install date for the cartridge schedule.
Write the install date on the box or in your phone. Each maker rates its cartridge differently, and the date is the only reminder you’ll get, since none of the three makers mentions a change indicator.
Keeping a bath filter clean
Task
Why
Source
Clean the housing with hydrogen peroxide or mild dish soap
Bacteria can grow inside with infrequent use
Crystal Quest
Wipe a chrome housing after use in hard water
Hard water can damage the coating
Crystal Quest
Change the cartridge on schedule
Rated life is the maker’s limit
All three makers
Let it drain and dry between baths
Standing water in a warm housing
General practice
Crystal Quest is the only maker that writes down the bacteria risk, and it applies to any filter that sits wet between uses. Rinse the housing, let it drain and give it the occasional clean with hydrogen peroxide or mild dish detergent, as Crystal Quest suggests.
Warranties, by maker
Maker
Term
What it excludes or requires
Canopy
One year, all customers
60-day returns in the U.S.
Crystal Quest
One year from purchase
Excludes replacement filters; RMA number before returns
Sprite
One year for plastic housings
Housing only, not the cartridge; register within 15 days
All three give a year on the housing. None covers cartridges as a warranty item, since they’re consumables. Sprite’s 15-day registration window is easy to miss, so fill it in when the filter arrives.
Questions people ask
What is the best bathtub water filter?
On our spec score, the Canopy Bath Tub Filter (10.0), then the Crystal Quest Bath Ball (8.6).
Do bathtub filters remove chlorine?
Canopy and Sprite say their filters reduce or neutralize chlorine, and Crystal Quest lists chlorine among what it removes; only Canopy states NSF/ANSI 177 testing.
How long does a bath filter cartridge last?
Canopy 90 days, Crystal Quest 12 to 18 months or 2,000 to 2,500 gallons, Sprite about 30 baths.
Will a bath filter fit my tub spout?
Usually. Canopy uses sized bands, Crystal Quest handles or a hook, Sprite a velcro harness.
Is a bathtub filter the same as a shower filter?
No. A tub filter fills the bath; a shower filter treats water at the showerhead.
Can I drink water from a bath filter?
No. None of these is a drinking water filter.
Do bath filters soften hard water?
No. None of the three claims to soften water.
What does NSF/ANSI 177 mean on a bath filter?
It’s the shower filtration standard; Canopy says its cartridge was tested to it.
Do I need to clean a bath filter?
Yes. Crystal Quest says bacteria can grow inside; clean with hydrogen peroxide or mild soap.
What warranty do bath filters have?
One year on the housing from all three makers; cartridges aren’t covered.
How I picked these
Why trust me
I’m Isaac Daniels, a licensed journeyman plumber in Georgia (license #JP507711), and I’ve used all three picks. Every figure comes from Canopy’s, Crystal Quest’s and Sprite’s own pages, read Oct 24, 2026, listed below.
How I pick
Bath filters that hang on or fit over a tub spout only.
Genuine maker listings, new and in stock on Amazon on the day of the update.
Every pick scores 7.0 or more on the spec score below.
Prices come from Amazon’s API with the time they were read.
The spec score, check by check
The seven bath filter checks below each count for one seventh of the score. A filter passes a check only when its maker’s own page says so about that product. Passes are added and scaled to 10, to one decimal. No bench test, no customer reviews.
Check (weight)
How it’s scored
Filter media named (1/7)
Pass if the maker names the media in the cartridge
Cartridge life stated (1/7)
Pass if the maker rates the cartridge in gallons, baths or days
Replacement cartridge named (1/7)
Pass if the maker names or sells its own replacement cartridge
NSF/ANSI 177 stated for it (1/7)
Pass if the maker states 177 testing or certification for this product; a brand-wide statement fails
Housing material stated (1/7)
Pass if the maker names the housing material
Attachment method stated (1/7)
Pass if the maker says how it attaches to a spout
Warranty term stated (1/7)
Pass if the maker publishes a warranty term that covers the product
Total
Passes ÷ 7 × 10, to one decimal
Filter
Media
Life
Cartridge
177
Housing
Attach
Warranty
Score
Canopy
Pass
Pass
Pass
Pass
Pass
Pass
Pass
10.0
Crystal Quest
Pass
Pass
Pass
Fail
Pass
Pass
Pass
8.6
Sprite Bath Pure
Fail
Pass
Pass
Fail
Pass
Pass
Pass
7.1
Sources
Canopy, Baby Bath Tub Filter product page (details, installation, warranty line), getcanopy.co, read Oct 24, 2026.
Crystal Quest, Bath Ball filter product page and specifications, crystalquest.com, read Oct 24, 2026.
Crystal Quest, Warranty Information (one year limited warranty), crystalquest.com, read Oct 24, 2026.
Sprite Industries, Bath Pure product page and Bath Filters page, spriteshowers.com, read Oct 24, 2026.
U.S. Consumer Product Safety Commission, SaferProducts recall API searches for bath filter, Canopy, Crystal Quest and Sprite, Oct 24, 2026 (no matching bath filter recalls).
Amazon product data for B0FLN3N4T1, B008A4AG2U, B08Y8GSVJS, B0FLMNZ21N, B079ZMF2R9 and B013GWV41C, read through the Creators API on Oct 24, 2026.
