XP Aqua Duetto 2 ATO System
XP_AQUA_DUETTO
The XP Aqua Duetto (Duetto 2) is a compact dual-sensor automatic top-off (ATO) system that packs two precise optical level sensors into one small magnetic-mount package for two layers of...
Or build it into a bundle — save up to 6% ↓What it is, and who it is for.
The XP Aqua Duetto (Duetto 2) is a compact dual-sensor automatic top-off (ATO) system that packs two precise optical level sensors into one small magnetic-mount package for two layers of overfill protection. It includes a DC pump rated at 74 gph with 8.2 ft of head pressure and requires no programming to install. Intelligent QST circuitry guards against pump run-on and works reliably even in complete darkness.
Build around the XP Aqua Duetto 2 ATO 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.
AutoAqua Smart ATO Lite Top-Off System
XP Aqua Duetto 2 ATO System
AutoAqua Smart ATO Micro SATO-120PAsked 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.