Waterpik Aquarius Countertop Water Flosser with 10 Settings, 7 Tips, White

Why it's worth it

The Aquarius is a plug-in countertop flosser with 10 pressure settings, a 22-ounce tank and seven tips. It gives you a gentle enough low setting for sore, bleeding gums and enough water to finish a full session without walking back to the faucet.

The Aquarius gives you more control than anything else here. Its pressure runs from 10 to 100 PSI across 10 discrete settings, which sounds like spec-sheet padding until your gums are inflamed. Verywell Health's dental contributors caution that anything above 90 PSI isn't a good idea when gum disease is active and uncontrolled, because too much force can disturb tissue that's trying to heal. So the useful part of that range is the bottom of it. Start low, climb slowly.

The 22-ounce reservoir buys you more than 90 seconds of continuous flossing. That matters more than it sounds. Most cordless models here carry between 7 and 10 ounces, and if you're working carefully around a bridge or a full arch of brackets, you'll drain one and have to stop and refill. With the Aquarius you fill it once and you're done. The tank pops off and goes on the top rack of the dishwasher.

From our review of 8 water flossers for gum health

What we like

• +The Aquarius gives you more control than anything else here
• +The 22-ounce reservoir buys you more than 90 seconds of continuous flossing
• +Waterpik was the first water flosser brand to earn the ADA Seal of Acceptance, and it still has the deepest pile of published…
• +The small stuff is what makes it stick

What to know

• –It's a countertop appliance, and it acts like one
• –It's not quiet. The motor hums at a level most people describe as similar to an electric shaver, which is fine at 9 p.m