Verdict
All guidesResearchOpen dataMethodologyAboutContact
Head-to-head · Best Water Flossers

Waterpik Aquarius vs Waterpik Ion Water Flosser

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

Verdict is reader-supported. As an Amazon Associate we earn from qualifying purchases. Some links on this page are affiliate links — if you click through and buy, we may earn a small commission at no extra cost to you. Our ratings are sourced from independent publications, not sponsors.
The short answer

Waterpik Ion Water Flosser comes out ahead by a clear margin (3.5 vs 4.0). The gap is mostly about fit for purpose — read the strengths below before deciding.

Waterpik Aquarius
Ranked #9 in Best Water Flossers
Waterpik Aquarius
5 sourcesall derived$79.99as of Aug 31

Consumer Reports reviewed the Waterpik Aquarius water flosser, noting it's a higher-end countertop model with additional features compared to basic units like the Ultra or Nano. The Aquarius includes blue LED indicators, a built-in timer, and a massage mode not found in lower-tier models. While it offers standard water flosser functionality with 600 series pressure capabilities, its $99 MSRP is considerably higher than typical sale prices of $50-60. The unit is sold in black and features a standard push-button control interface. This model is positioned as a premium option for those seeking enhanced features over basic water flossers.

Strengths
  • — Features blue LED indicators for easy operation
  • — Includes a built-in timer function
  • — Has a massage mode not available in lower-end models
Watch-outs
  • — Higher price point compared to basic models like Ultra or Nano
  • — Retail price of $99 is significantly more than sale prices of $50-60
$79.99 · Check Price on AmazonFull review →
Waterpik Ion Water Flosser
Higher ratedRanked #4 in Best Water Flossers
Waterpik Ion Water Flosser
7 sourcesall derived$79.99as of Aug 31

The Waterpik Ion Water Flosser combines the benefits of a countertop unit with cordless convenience through its built-in rechargeable battery. Healthline notes it's particularly helpful for those with braces, implants, or arthritis, while ElectricTeeth reviewer John praises its effectiveness and ease of use. The device offers a great clean and is suitable for daily use, though some dental professionals still prefer traditional flossing. While it's more compact than standard models, it's not fully travel-friendly and may not remove all plaque.

Strengths
  • — Technically cordless with built-in rechargeable battery
  • — Offers benefits of countertop unit in more compact design
  • — Clinically proven effectiveness
Watch-outs
  • — May not remove all plaque completely
  • — Can be costly
$79.99 · Check Price on AmazonFull review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

Specs side-by-side

SpecWaterpik AquariusWaterpik Ion Water Flosser
Water Capacity22 Ounces ( 651 ml )591 ml (20 ounces)
Nozzle Types7 flossing tips7 flossing tips included
Cleaning ModesFloss and Hydro-Pulse Massage10 pressure settings
TypeCountertopCordless Water Flosser
Dimensions3.8 x 4.7 x 10.3 inches; 1.46 pounds5.7 x 5.9 x 7.3 inches; 1.3 pounds
Charging Type—Magnetic USB-A charging cable
Battery Life—up to 4 weeks
← See the full ranking of best water flossers