AquaBliss SF220 Shower Filter vs Aquasana Shower Filter AQ-4100

Buy the Aquasana AQ-4100 if you want third-party proof: it is certified to NSF/ANSI 177 for over 90% chlorine reduction and comes with a massaging multi-setting shower head. Buy the AquaBliss SF220 if you want a multi-stage cartridge with calcium sulfite and KDF-55 that also claims sediment and hardness reduction, and you already own a shower head you like. The Aquasana has a far larger review base (1,869 ratings at 4.4) and a plastic body that resists the cracking some SF220 owners report. The SF220 scores higher on its smaller sample (4.9 from 91) and installs in minutes with no tools, but its filtration claims are not NSF-certified.

• Choose the AquaBliss SF220 if you want a multi-stage cartridge that targets chlorine, sediment and hardness and you plan to keep your current shower head.
• Choose the Aquasana AQ-4100 if you want NSF-certified chlorine reduction and a complete unit with a multi-setting shower head included.