Waterpik Aquarius Water Flosser WP-660 vs Waterpik Sonic Fusion 2.0
Verdict: The Waterpik Aquarius WP-660 outperforms the Sonic Fusion 2.0 for pure water flossing efficacy with its larger reservoir and proven plaque removal rates from independent studies. The Sonic Fusion 2.0 provides convenience through its dual sonic toothbrush and flosser design but sacrifices reservoir size and dedicated performance. These products serve different primary purposes, with the Aquarius better suited for targeted flossing routines.
Winner: Waterpik Aquarius Water Flosser WP-660
Waterpik Aquarius Water Flosser WP-660: 8.5/10
Waterpik Sonic Fusion 2.0: 7/10
Spec-by-spec comparison
| Waterpik Aquarius Water Flosser WP-660 | Waterpik Sonic Fusion 2.0 | |
|---|---|---|
| Reservoir Capacity | 22 oz | — |
| Pressure Levels | 10 | 10 |
| Pulsations per Minute | 1400 | 1400 |
| Power Source | Corded | Rechargeable |
Waterpik Aquarius Water Flosser WP-660
What works
- 10 pressure settings for customizable cleaning
- Large 22 oz reservoir for full-mouth sessions
- Proven 99% plaque removal in clinical studies
What doesn't
- Requires countertop space and outlet access
- No built-in toothbrush function
Waterpik Sonic Fusion 2.0
What works
- Combines sonic toothbrush with water flosser
- Cordless design for bathroom portability
- Multiple brushing and flossing modes
What doesn't
- Smaller effective reservoir limits session length
- Higher price for dual-function device
Bottom line
Our pick: Waterpik Aquarius Water Flosser WP-660. It edges out the alternative on 10 pressure settings for customizable cleaning. That said, Waterpik Sonic Fusion 2.0 still wins on combines sonic toothbrush with water flosser — consider it if that single trade matters most for your use.
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