Waterpik Aquarius Review: Is the Flagship Model Worth It?
Reviewed by the waterflosser.au editorial team · Published August 2026 · Updated August 2026 · 8 min read
The Waterpik Aquarius is the model most people picture when they think "Waterpik" — a countertop unit with a large water tank and a wide pressure range, and one of the longest-running names in the category globally.
Why it's the benchmark model
The Aquarius typically ships with 10 pressure settings and a generous tank — usually in the 600–650ml range, well above most cordless models — meaning a full mouth clean in a single fill for most people. It's also sold with a wide range of tip types (classic jet, orthodontic, plaque seeker, toothbrush tip) in the box or as accessories, more than most competitors offer.
Countertop trade-offs
Being a plug-in countertop unit, the Aquarius is not travel-friendly and takes up more bathroom counter space than a cordless model. If you specifically want something to pack for trips, the Waterpik Cordless Advanced is the better fit from the same brand.
Price and value
The Aquarius generally sits at the premium end of Waterpik's range in Australia, priced above the Cordless Advanced given the larger tank, motor and included tip variety. It's a reasonable investment if the flosser will have a permanent spot on your counter and you want the widest tip and pressure options available from the brand.
How it compares to Philips Sonicare's countertop model
Against the Philips Sonicare Power Flosser, the Aquarius generally offers more pressure settings and a wider tip ecosystem, while the Philips unit counters with a quad-stream tip design aimed at covering a wider area per pass. Neither is a clear-cut winner — it comes down to whether you value granular pressure control (Aquarius) or breadth of stream coverage (Sonicare).
Frequently asked questions
Is the Waterpik Aquarius worth the extra price over the Cordless Advanced?
If you want the largest tank, the widest tip selection and the highest pressure ceiling, and you're happy with a countertop-only unit, yes. If portability matters at all, the Cordless Advanced delivers similar pressure control in a travel-friendly form.
How big is the Waterpik Aquarius tank?
Typically in the 600–650ml range depending on the exact model year, which is large enough for most people to complete a full mouth clean in one fill without refilling mid-session.
Does the Aquarius come with different tip types?
Yes — it's typically sold with multiple tip types included (such as a classic jet tip, orthodontic tip and plaque seeker tip), which is one of its advantages over more basic single-tip models.
- Waterpik — manufacturer product specifications
- Australian Dental Association — oral health information
Product prices and specifications are checked against manufacturer and retailer listings; see our editorial process and affiliate disclosure.