Head-to-head · Best Water Flossers

Waterpik Aquarius WP-660 vs Waterpik Ion Professional

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Waterpik Aquarius WP-660 comes out ahead by a narrow margin (4.8 vs 4.5). The gap is mostly about users committed to daily flossing with multiple oral conditions — read the strengths below before deciding.

Higher ratedRanked #1 in Best Water Flossers

Waterpik Aquarius WP-660

4.8

$80

The Aquarius WP-660 is the best-overall pick — Waterpik's countertop flagship with most settings and tip options.

Strengths

— 10 pressure settings — most adjustability in this lineup
— 7 tip variations (orthodontic, plaque, periodontal, etc.)
— Massage mode for gum stimulation

Watch-outs

— Countertop only — no portability
— 2-minute reservoir runtime
— Splatter learning curve

$80 · Check Price on Amazon Full review →

Ranked #4 in Best Water Flossers

Waterpik Ion Professional

4.5

$129

The Ion Professional is the cordless countertop pick — outlet-free reservoir-class flossing without sacrificing settings.

Strengths

— Cordless countertop hybrid — outlet-free placement
— 10 pressure settings
— 2-minute reservoir

Watch-outs

— Larger than typical cordless
— Premium price
— Charging dock takes counter space

$129 · Check Price on Amazon Full review →

How they stack up

Waterpik Aquarius WP-660

Most settings and tips. Countertop. Best clinical reputation.

Waterpik Ion Professional

Cordless countertop hybrid. 10 settings like Aquarius. Premium price.

Specs side-by-side

Spec	Waterpik Aquarius WP-660	Waterpik Ion Professional
Type	Countertop	Cordless countertop
Pressure	10 settings	10 settings
Tips	7	—
Brand	Waterpik	—
Reservoir	—	2 minutes
Charging	—	Magnetic dock

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