Now shipping the AquaSense ATO

Aquariums
evolved.

Reef-grade hardware and a friendly app — so your tank runs itself.

  • Free US shipping
  • Replacement on arrival defects
AquaSense ATO sensor mounted on a reef tank
Salinity
1.026 sg
Top-off
All systems OK
Free US shipping on every orderDirect-to-cloud — no extra hardware

Why AquaSense

Engineered like the gear you wish you'd bought first.

Non-contact top-off

An ultrasonic distance sensor watches the water level from above the rim — no float to stick, nothing in the water.

Reservoir-low pad

A stick-on conductive pad strip on your reservoir wall pauses the pump and alerts you the instant water drops below it.

Just works

Setup in under 10 minutes. Live tank insights in a beautiful app — for iOS, Android, and the web.

How it works

Set it up faster than you can mix saltwater.

Four steps, ten minutes, no soldering, no scripting.

01

Mount the sensor

Clips onto the rim of your sump or display tank with the included silicone bracket.

02

Pair with the app

Open the AquaSense app, scan the QR code on the back, and join your Wi-Fi.

03

Calibrate full

One tap to mark your normal water level. The sensor learns the rest automatically.

04

Forget it exists

AquaSense quietly maintains your level forever. You'll only hear from us when something matters.

Non-contact sensing

Nothing in the water, nothing to clog.

A float switch only knows two states: open and closed. AquaSense uses an ultrasonic distance sensor mounted above the rim to read the actual water level continuously, then doses in small, predictable pulses — keeping salinity steadier than a float ever could.

  • No probe ever touches the tank water
  • Self-calibrating in the first 24 hours
  • Anti-splash filtering ignores wave action
Water level vs target — last 24h
Steady level, all day
live
target+40-1000:0023:59
AquaSense
Typical float ATO
AquaSense band
Reef tank with AquaSense controller mounted on the sump
Notice

Display tank ATO topped off 38 mL. Reservoir at 62%.

Push notification sent to your phone

Failsafes that run on-device

If something goes wrong, the pump stops.

The pump runtime cap and the reservoir low-water pad both run on the controller itself, so they keep working even when your Wi-Fi is down or our cloud is offline.

Pump runtime cap

Hard 90-second limit per fill cycle.

Low-water pad

Stick-on conductive strip on your reservoir wall.

On-device logic

Failsafes run on the controller — no cloud needed.

Push alerts

Sent the moment a fill cycle is paused.

The app

Your whole tank, in your pocket.

Live water level, top-off history, alerts, and multi-tank support — all from a single app on iOS and Android. The optional AquaSense Pro plan (

4.99/mo) unlocks the AI tank assistant.

AquaSense home screen showing the ATO Reservoir at 53% with live status, refill history, and pump cycle stats.

Live water level, at a glance

See your reservoir, last refill, and forecast the moment you open the app.

AquaSense Pro upgrade screen describing the AI tank assistant features.

Optional AI tank assistant

AquaSense Pro adds a hands-free AI agent that manages your tank by chat.

AquaSense create tank onboarding screen with fields for name, unit system, tank type, and volume.

Set up your tank in a minute

A guided onboarding builds a digital twin of your aquarium on first launch.

Ultrasonic

Tank-side sensor

Conductive pad

Reservoir sensor

Wi-Fi 2.4 GHz

Connectivity

12 V DC adapter

Power

12 V peristaltic

Pump

~ 7.5 mL/s

Pump output

Up to 300 gal

Tank size

Common questions

Anything else?

Free shipping in the US

Stop babysitting your tank.

The AquaSense ATO ships free in the US. If yours arrives damaged or defective, we'll replace it.

  • Free US shipping
  • Optional Pro AI plan