The Shower Filter I Keep Rebuying (and What It Actually Does)

The drinking water in my house got sorted out years ago, and I have written about that at length. The shower took me a lot longer to think about, mostly because I assumed shower filters were a gimmick.

Some of them are. The one on my shower arm is not, but the honest version of this post has to start with what a $33 cartridge screwed into a pipe can and cannot do, because this category is full of promises that do not survive contact with plumbing.

What it is

The AquaBliss is a canister that screws in between the shower arm and the shower head. Installation is the full extent of the DIY: unscrew the head, screw this on, screw the head back into it. Inside is a replaceable cartridge that the water passes through on its way to you.

Cartridges last a few months, and a three-pack of replacements covers roughly a year of showers here. There is also more than one of these in the house, I bought a pair for two showers first and added another later, which regular readers will recognize as the only endorsement I really trust. The economics are the same as my under-sink system: you buy the canister once at $33, and the cartridges are the actual product.

What it actually does

It reduces chlorine. That is the honest core of the product, and it happens to be the thing municipal water reliably has in it, because chlorine is how the utility keeps the water safe on its way to you. Sensible at the treatment plant, less pleasant coming out of a shower head in hot water, where it comes off into the air and you stand in it. The chlorine smell was half of why I bought it. The other half was skin and hair, the dry and itchy end of the story, and there I will only speak for this household: the water feels different and nobody here has asked to go back. An observation, not dermatology.

One more southern specific. Down here the water carries a faint sulfur note some days, even city water, it is just part of living in the Southeast. The filter helps with that a bit. Only a bit, I want to be careful, sulfur smell is mostly a job for whole house treatment, but “a bit” is honestly more than I expected from a $33 canister.

What it does not do, which the listings will not tell you

Here is the paragraph I wish somebody had written for me. If you are searching for the best shower filter for hard water, what you actually need is not a shower filter.

Hard water is dissolved calcium and magnesium, and removing minerals from water at the rate a shower flows takes serious equipment. That is what a water softener is: a tank in the utility room, salt bags, the whole commitment. A cartridge the size of a soda can passing two and a half gallons a minute is not doing that, no matter what the listing promises about “softening” your water. Mine does not claim to and I would not repeat it if it did.

The same goes for fluoride, which shower filters do not remove, and which I have covered from every angle in the drinking water post. A shower filter is a chlorine tool. Buy it for that or not at all.

If you want to know what is actually in your water before spending anything, the EWG Tap Water Database will show you your utility’s numbers by zip code. One reading note: EWG scores water against its own health guidelines, which are much stricter than the federal legal limits, so “exceeds guideline” is common and does not mean your water is illegal or dangerous. It means you are reading a strict yardstick. For a wider look at home water filtering, the site has a full comparison post.

The bath one

There is a second filter in this house, and it is not a shower product, which apparently needs saying because I filed it wrong myself for a while. The Santevia is a bath faucet filter. It hangs off the tub spout and treats the water while the bath fills. Slower water, longer contact time, different job.

It is still on the tub and it gets used by whoever is taking a bath, which is the whole house rather than any one person. If your question is about baths rather than showers, that is the shape of product to look for.

The filters

Quick questions

Will a shower filter fix hard water?
No. Hard water is a softener problem, tank and salt and all. Any cartridge filter promising to soften water at shower flow rates is overpromising, including the ones with better marketing than mine.

Will it help skin or hair?
Less chlorine in hot water is a reasonable thing to want on your skin. Beyond that I can only tell you nobody in this house has gone back, which is an anecdote, and I am labeling it one.

How often do the cartridges need changing?
The maker says a few months, and that matches my experience. If you have heavily chlorinated water or long showers, earlier.

Is this a substitute for filtering drinking water?
No, they are different problems. What I did about the kitchen tap is its own post.

This is a plumbing aisle purchase, not a health intervention. If you have a specific water quality concern, look up your utility’s report or get your water tested rather than shopping your way to reassurance.