---
product_id: 577042051
title: "Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue"
brand: "useek"
price: "$U5946"
currency: UYU
in_stock: true
url: https://www.desertcart.uy/products/577042051-auto-top-off-for-saltwater-aquarium-water-ato-system-both
store_origin: UY
region: Uruguay
---

# 0.7-inch nano compact design Hassle-free all-in-one installation kit Real-time refill monitoring with QST tech Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue

**Brand:** useek
**Price:** $U5946
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your reef flawless with smart, sleek water top-off tech!

## Quick Answers

- **What is this?** Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue by useek
- **How much does it cost?** $U5946 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/577042051-auto-top-off-for-saltwater-aquarium-water-ato-system-both)

## Best For

- useek enthusiasts

## Why This Product

- Trusted useek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Nano-Sized Elegance:** Ultra-compact 0.7-inch diameter fits discreetly in any tank setup, rimmed or rimless.
- • **Smart Safety Alerts:** QST technology detects refill anomalies, halting pumps to prevent overflows and dry runs.
- • **Confidence in Every Drop:** Backed by a 2-year warranty and responsive support, guaranteeing peace of mind for your investment.
- • **Plug & Play Aquarium Upgrade:** Complete kit ensures quick, tool-free installation—ideal for busy pros and hobbyists alike.
- • **Effortless Water Level Mastery:** Automatically maintains perfect water levels to stabilize salinity and protect your aquatic ecosystem.

## Overview

The UseekAuto Top Off ATO System is a compact, intelligent solution designed for both saltwater and freshwater aquariums. It automatically maintains water levels to prevent salinity spikes, features real-time refill protection with QST technology, and offers an easy installation process. Its nano-sized design fits seamlessly in any tank, supported by a 2-year warranty and dedicated customer service for reliable, worry-free aquarium care.

## Description

Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue

## Features

- WHY YOU NEED ATO? - All Aquarium regularly evaporate water. In salt water Aquarium, as the water evaporates, the water level in Aquarium will drop and the salinity concentration will rise. Compared with other methods,The ATO system automatically maintains the water level in the aquarium, preventing fluctuations in salinity concentration and maintaining a stable and healthy environment for aquatic life.
- SPACE-SAVING, COMPACT DESIGN - With a nano size of only 0.7 inches diameter, this Auto Top Off for aquariums is both unobtrusive and elegant, fitting seamlessly in rimmed or rimless tanks and sumps.
- REAL-TIME PROTECTION WITH QST - Our ATO system carefully calculates and adjusts to the ideal fill time, offering visual alerts and stopping the pump if it detects a refilling time 6 times longer than expected, ensuring protection against overfilling, dry running, and sensor malfunctions.
- EASY INSTALLATION & VERSATILE USE - The Auto Top Off kit includes everything you need for a hassle-free setup, making it simple to integrate into any rimmed or rimless aquarium. A perfect gift for aquarium enthusiasts, this system is a delightful surprise for friends and family alike.
- TWO-YEAR WARRANTY & RESPONSIVE CUSTOMER SERVICE - Your satisfaction is our priority, so we offer a two-year product warranty and friendly customer support to address any questions or concerns. Enjoy peace of mind with our free replacement policy and helpful assistance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Package Dimensions | 16.41 x 16.31 x 7.19 cm; 399 g |
| Item model number | AT-200 |
| Color | Blue |
| Special Features | Space-Saving, Real-Time Protected, Automatic Water Level Maintenance |
| Specific Uses | Reef and Freshwater Aquariums |
| batteries required | No |
| Batteries Included | No |
| Item Weight | 399 g |

## Product Details

- **Brand:** Useek
- **Material:** Acrylonitrile Butadiene Styrene (ABS)
- **Special features:** Space-Saving, Real-Time Protected, Automatic Water Level Maintenance
- **Item weight:** 0.4 Kilograms
- **Shape:** Irregular shape

## Images

![Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue - Image 1](https://m.media-amazon.com/images/I/713hjxk8HnL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Would this work on a 60 gallon AIO? I’ve only had it on a nano**
A: More surface area = longer top off

**Q: Does the sensor light up or is there no light in the sensor?**
A: It lights up.  It blinks when topping off

## Frequently Bought Together

- Useek Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue
- Aquatic Life RO Buddie 4-Stage Reverse Osmosis Deionization Water Filter System RO/DI Filtration Units for Aquarium, 50 GPD

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**Shop now:** [https://www.desertcart.uy/products/577042051-auto-top-off-for-saltwater-aquarium-water-ato-system-both](https://www.desertcart.uy/products/577042051-auto-top-off-for-saltwater-aquarium-water-ato-system-both)

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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-20*