Water Filter Guru
We Use Quantitative Data, Original Research, & Expert Insight to Test Water Filters
The Filter Baby Pro costs $139 upfront, making it one of the pricier shower filters we've tested. Replacement filters cost $49, with ongoing filter costs averaging about 3.4 cents per gallon, or around $196 per year based on the recommended replacement schedule.
Full Video: https://youtu.be/zGTatzvGuGw?si=w2nqJa_jHqUolXOH
We tested hard water at 250 ppm before filtration and 251 ppm after. The results showed virtually no change, confirming what we often see with shower filters—they generally can't remove the calcium and magnesium that cause hard water.
Full Video: https://youtu.be/zGTatzvGuGw?si=w2nqJa_jHqUolXOH
Our testing showed mixed results for disinfection byproducts (DBPs). Some compounds decreased, others increased, making it difficult to conclude that the filter provided meaningful DBP reduction.
Full Video: https://youtu.be/zGTatzvGuGw?si=w2nqJa_jHqUolXOH
Not all shower filters are built the same. Filter Baby stands out with its solid metal housing and a cartridge that looks purpose-built instead of a generic private-label design. Small details, but they make a big difference.
Full Video: https://youtu.be/zGTatzvGuGw?si=w2nqJa_jHqUolXOH
06/11/2026
The Hello Klean Shower Filter is an inline filter that’s claimed to reduce “+90% of chlorine, heavy metals and other impurities”. It uses a blend of KDF, calcium sulfite, ceramic beads, and activated carbon media to “protect hair and skin with better water”. We tested the filter using chlorinated city water to see how effectively it could reduce the shower contaminants we were concerned about.
We’ve reviewed over a dozen shower filters so far, and this Hello Klean model was one of the poorest performing, with an overall weighted score of 7.39 You’ll find our results and observations in this review.
Overall Score: 7.39
How We Test & Score
6.00 Contaminant Reduction
7.80 Design
9.50 Maintenance
10.00 Filtration Rate
9.00 Setup
9.10
My Unsponsored Hello Klean Shower Filter Review See what my lab testing revealed about the Hello Klean shower filter, and whether or not we'd recommend it, based on the data - not a sponsorship.
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