NSF Certified Shower Filter: The Only 6 Products That Actually Are (2026)

NSF certified shower filter

Quick fact: an NSF certified shower filter is rarer than the marketing suggests. As of a September 2026 database check, only six shower filter products from five manufacturers hold an actual NSF/ANSI 177 listing. Everything else claiming to be “tested to NSF 177,” “NSF-grade,” or simply “NSF certified” is making a claim NSF itself hasn’t … Read more

AquaTru vs Clearly Filtered: The One That Actually Fits Your Situation

AquaTru vs Clearly Filtered

AquaTru vs Clearly Filtered is the comparison that comes up constantly for renters and apartment dwellers trying to get serious about their water without touching a single pipe. Both are no-installation, both remove PFAS and lead, and both get recommended all over the internet. The difference between them, once you look at the actual certification … Read more

Do ZeroWater Filters Remove PFAS and Fluoride?

Do ZeroWater Filters Remove PFAS and Fluoride

Do ZeroWater filters remove PFAS and fluoride? Yes, both, and often near-completely. But whether your specific filter is certified to do so is a separate question, and the answer depends almost entirely on which version you’re buying. The brand went through a significant overhaul in 2025, and the gap between the old product and the … Read more

Culligan ZeroWater vs MaxClear: Which One Should I Buy?

Culligan ZeroWater vs MaxClear

ZeroWater wins if you care most about fluoride removal and broad contaminant coverage on a budget. MaxClear makes more sense for longer filter life and mineral retention, but the devil is in the details. If you’ve been shopping for a water filter that tackles PFAS; the so-called “forever chemicals” now regulated by the EPA, you’ve … Read more

Can Layered Double Hydroxide Replace Reverse Osmosis for PFAS?

Layered Double Hydroxide PFAS removal

It’s called Layered Double Hydroxide (LDH) and can remove PFAS “forever chemicals” at record speed; 100x faster than activated carbon. It sounds like a revolution, but you can’t buy one just yet. Here’s what the science actually says, why reverse osmosis still wins for now, and when LDH filters might finally make it to your … Read more

Countertop vs Under-Sink Water Filter Comparison (2026)

Countertop vs Under-Sink Water Filter Comparison

The countertop vs under-sink water filter comparison is the single most common question I get asked, usually while someone’s staring at their phone with six browser tabs open, trying to figure out which system actually makes sense for their kitchen. I’ve spent years installing, maintaining, and ripping out water filtration systems in people’s homes, and … Read more