AutoAqua Smart ATO Top-Off System
AA-ATO
The AutoAqua Smart ATO is an automatic top-off system that uses a contactless digital optical sensor with no moving parts that can fail, integrated with AFS (Auto Feedback Security) for...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
The AutoAqua Smart ATO is an automatic top-off system that uses a contactless digital optical sensor with no moving parts that can fail, integrated with AFS (Auto Feedback Security) for reliable operation. It mounts to a clear glass or acrylic sump up to 1/2 inch thick to monitor water level and automatically refill evaporated water using the included DC brushless pump. The kit includes the controller/sensor, power adapter, pump, and tubing with a universal holder.
Build around the AutoAqua Smart ATO Top-Off System.
It's already in your system below. Add the flow, filtration and dosing around it and the discount starts working — tiers climb as the build grows, and the reef meter fills with it.
Pick the right one, not the biggest one
The honest line-up from ato & ro/di. Most buyers reading this page should buy the middle column.
IceCap ATO Auto Top-Off System
AutoAqua Smart ATO Top-Off System
BRS 4-Stage 75 GPD RO/DI SystemAsked before checkout
The questions our support inbox actually gets.
Does it ship quickly?+
Orders placed before 2 PM ET on a business day leave the same day. Tracking is emailed the moment the label prints.
What if it's the wrong fit for my tank?+
Return it. 30 days, no restocking fee, refund to the original payment method. Better: tell us your tank first and we'll spec the system for free — half of all returns are sizing problems.
Who handles the warranty?+
We do. Everything carries the manufacturer's warranty and we run the claim for you — one email to us instead of a ticket queue.
How does the bundle discount work?+
Add items in the bundle builder: 2+ items saves 5%, 3+ saves 8%, 4+ saves 12%, and 5+ saves 15% off the whole system, applied at checkout.