Head-to-head · Best Water Flossers

AquaSonic Aqua Flosser vs Waterpik Aquarius WP-660

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 (4.3 vs 4.6). The gap is mostly about home users who want the most thoroughly proven, highest-capacity countertop water flosser and have an outlet and counter space — read the strengths below before deciding.

Ranked #5 in Best Water Flossers

AquaSonic Aqua Flosser

4.3

$39.95as of Jun 7

The AquaSonic Aqua Flosser is the budget pick: a complete cordless oral irrigator with three modes, five tips, and IPX7 waterproofing for around $40 - one of the cheapest full systems on the market. MedGrade scores it 86/100 and calls it effective for the price. The small 150ml tank and three-mode control put it behind the Waterpik units on capacity and finesse, but for an inexpensive, portable, no-frills water flosser it gets the fundamentals right.

Strengths

— One of the lowest prices for a complete cordless oral irrigator system
— Three modes (Normal, Soft, Pulse) cover everyday cleaning, sensitive gums, and gum massage
— Five interchangeable tips including periodontal, orthodontic, and a tongue scraper

Watch-outs

— Small 150ml tank holds far less than countertop units
— Only three pressure modes, not the fine control of a Waterpik
— Power-button placement makes it easy to turn on unintentionally

$39.95 · Check Price on Amazon Full review →

Higher ratedRanked #2 in Best Water Flossers

Waterpik Aquarius WP-660

4.6

$99.99as of Jun 7

The Waterpik Aquarius WP-660 is the countertop water flosser reviewers treat as the benchmark. Ten pressure settings, a big 22 oz reservoir for 90-plus seconds of flossing, seven tips, and two modes make it the most complete and most clinically recommended irrigator you can buy. MedGrade scores it 92/100 and calls it the industry standard. It is loud at high pressure and takes counter space, but for daily home use nothing has a stronger track record.

Strengths

— 10 pressure settings (10-100 PSI) cover sensitive gums to aggressive plaque removal
— Large 22 oz reservoir delivers 90+ seconds of flossing per fill
— Seven included tips cover braces, implants, plaque, and multiple users

Watch-outs

— Motor and stream are noticeably loud at high pressure
— Countertop footprint takes more space than a cordless unit
— Reservoir can develop mold if not dried between uses

$99.99 · Check Price on Amazon Full review →

How they stack up

AquaSonic Aqua Flosser

The budget pick - it is by far the cheapest here, undercutting the Waterpik Aquarius WP-660, Waterpik ION Professional WF-12, Waterpik Cordless Advanced 2.0 WP-580, and Philips Sonicare Power Flosser 3000, while trailing all of them on tank size, pressure control, and clinical pedigree; it is the entry point for trying a water flosser without a big spend.

Waterpik Aquarius WP-660

The countertop benchmark - it offers the same 10 pressure settings and 22 oz reservoir as the cordless Waterpik ION Professional WF-12 but plugs in for unlimited run time, beats the budget AquaSonic Aqua Flosser on power and tip selection, and unlike the cordless Waterpik Cordless Advanced 2.0 WP-580 or the Philips Sonicare Power Flosser 3000 it never needs recharging.

Specs side-by-side

Spec	AquaSonic Aqua Flosser	Waterpik Aquarius WP-660
Type	Cordless handheld	Countertop (corded)
Pressure Modes	3 (Normal, Soft, Pulse)	—
Reservoir	150ml	22 oz (90+ sec)
Tips Included	5 (incl. periodontal, ortho, tongue)	7
Battery	Rechargeable lithium-ion (USB)	—
Waterproof	IPX7	—
Accessories	Travel bag	—
Warranty	1 year	3-year limited
Pressure Settings	—	10 (10-100 PSI)
Modes	—	Floss + Hydro-Pulse Massage
Pulses	—	1,400 per minute
Timer	—	1-min timer + 30-sec pacer

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