# Waterpik Aquarius WP-660 vs Coslus C20 Water Flosser (F5020E): specs and price compared

A sourced, side-by-side comparison of the Waterpik Aquarius WP-660 (Waterpik) and Coslus C20 Water Flosser (F5020E) (Coslus) among water flossers. Coslus C20 Water Flosser (F5020E) is the cheaper of the two at $42.99.

## Side by side

| Spec | Waterpik Aquarius WP-660 | Coslus C20 Water Flosser (F5020E) |
| --- | --- | --- |
| US price | $99.99 | $42.99 |
| Brand | Waterpik | Coslus |
| Released | 2013 | 2022 |
| Type | countertop | cordless |
| Tank capacity (ml) | 651 | 300 |
| Pressure settings | 10 | 3 |
| Max pressure (psi) | 100 | 120 |
| Tips included | 7 | 5 |
| Power | corded | rechargeable |
| Runtime min | 1.5 | 1 |

## Key differences

- Type: Waterpik Aquarius WP-660 countertop vs Coslus C20 Water Flosser (F5020E) cordless
- Tank capacity (ml): Waterpik Aquarius WP-660 651 vs Coslus C20 Water Flosser (F5020E) 300
- Pressure settings: Waterpik Aquarius WP-660 10 vs Coslus C20 Water Flosser (F5020E) 3
- Max pressure (psi): Waterpik Aquarius WP-660 100 vs Coslus C20 Water Flosser (F5020E) 120
- Tips included: Waterpik Aquarius WP-660 7 vs Coslus C20 Water Flosser (F5020E) 5
- Power: Waterpik Aquarius WP-660 corded vs Coslus C20 Water Flosser (F5020E) rechargeable
- Runtime min: Waterpik Aquarius WP-660 1.5 vs Coslus C20 Water Flosser (F5020E) 1

## Sources

- Waterpik Aquarius WP-660: https://www.waterpik.com/products/dental-water-flosser/WP-660/ (waterpik.com, verified 2026-06-19)
- Coslus C20 Water Flosser (F5020E): https://www.coslus.com/products/coslus-c20-water-dental-flosser (coslus.com, verified 2026-06-19)

Canonical: https://frontdeskreview.com/gear/water-flossers/waterpik-aquarius-wp-660-vs-coslus-c20-f5020e/
Cite: Per The Front Desk Review, Waterpik Aquarius WP-660 ($99.99) vs Coslus C20 Water Flosser (F5020E) ($42.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/water-flossers/waterpik-aquarius-wp-660-vs-coslus-c20-f5020e/
License: CC BY 4.0.