---
product_id: 550266203
title: "Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue"
brand: "useek"
price: "65599CFA"
currency: XOF
in_stock: true
reviews_count: 8
category: "Useek"
url: https://www.desertcart.sn/products/550266203-auto-top-off-for-saltwater-aquarium-water-ato-system-both
store_origin: SN
region: Senegal
---

# 0.7-inch nano sensor size Easy all-in-one installation kit QST real-time refill protection Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue

**Brand:** useek
**Price:** 65599CFA
**Availability:** ✅ In Stock

## Summary

> 💦 Keep your reef thriving with smart, invisible hydration!

## 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?** 65599CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/550266203-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

- • **Effortless Setup:** Complete kit designed for quick, hassle-free installation—get your aquarium auto-topped in minutes.
- • **Nano-Sized Precision:** Ultra-compact 0.7-inch sensor fits discreetly in any tank setup, rimmed or rimless.
- • **Smart Safety Control:** QST technology monitors refill times, preventing overflows and dry runs with instant alerts.
- • **Peace of Mind Warranty:** Backed by a 2-year warranty and responsive customer support for worry-free aquatic care.
- • **Stable Salinity, Healthy Life:** Automatically maintains water levels to keep salinity steady, ensuring optimal reef and freshwater conditions.

## Overview

The Useek Auto Top Off system is a compact, reliable solution designed to maintain stable water levels in both saltwater and freshwater aquariums. Featuring a tiny 0.7-inch sensor and advanced QST technology, it prevents overfilling and dry running by monitoring refill times in real-time. Easy to install and compatible with rimmed or rimless tanks, this system ensures consistent salinity and a healthy aquatic environment, backed by a 2-year warranty and dedicated customer support.

## Description

desertcart.com : Useek Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue : Pet Supplies

Review: Perfect! - This was easy to set up. It is small and discreet. It has stabilized the water level and appears to work as expected. The sensor does what it was created to do. So far, so good! And the price point is perfect.
Review: Works for water changes too - Honestly one of the best purchases I’ve made for my aquarium, although I don’t use it for its intended purpose. I use if for water changes, putting the pump in my aquarium with the sensor off to the side, and the water goes into a bucket, and for refilling I unplug the sensor, move the pump to the bucket of new water, put the sensor in my aquarium as indicated in the instructions, and then plug the sensor back in. It is so, so, so much easier than getting my siphon started, stresses my fish out WAY less, and creates way less of a mess too. It obviously doesn’t work for vacuuming gravel, but it’s made maintenance on my aquarium so much less stressful, and freed up a decent chunk of time too.

## 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 |
|---------------|-------|
| Brand | Useek |
| Customer Reviews | 4.0 out of 5 stars 628 Reviews |
| Item Weight | 0.4 Kilograms |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Shape | Irregular shape |
| Special Feature | Space-Saving, Real-Time Protected, Automatic Water Level Maintenance |
| Specific Uses For Product | Reef and Freshwater Aquariums |

## Product Details

- **Brand:** Useek
- **Color:** Blue
- **Included Components:** Pump
- **Item Weight:** 0.4 Kilograms
- **Material:** Acrylonitrile Butadiene Styrene (ABS)
- **Shape:** Irregular shape
- **Special Feature:** Space-Saving, Real-Time Protected, Automatic Water Level Maintenance
- **Specific Uses For Product:** Reef and Freshwater Aquariums
- **Style:** Modern
- **UPC:** 799355749961

## 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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect!
*by T***E on February 10, 2026*

This was easy to set up. It is small and discreet. It has stabilized the water level and appears to work as expected. The sensor does what it was created to do. So far, so good! And the price point is perfect.

### ⭐⭐⭐⭐⭐ Works for water changes too
*by S***M on January 13, 2026*

Honestly one of the best purchases I’ve made for my aquarium, although I don’t use it for its intended purpose. I use if for water changes, putting the pump in my aquarium with the sensor off to the side, and the water goes into a bucket, and for refilling I unplug the sensor, move the pump to the bucket of new water, put the sensor in my aquarium as indicated in the instructions, and then plug the sensor back in. It is so, so, so much easier than getting my siphon started, stresses my fish out WAY less, and creates way less of a mess too. It obviously doesn’t work for vacuuming gravel, but it’s made maintenance on my aquarium so much less stressful, and freed up a decent chunk of time too.

### ⭐ Failed after 1 month
*by P***N on February 19, 2026*

Worked alright for about a month and then one day it just pumped every bit of my fresh water into my tank. Tried cleaning the whole assembly and letting it go again and it did the same thing

## 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.sn/products/550266203-auto-top-off-for-saltwater-aquarium-water-ato-system-both](https://www.desertcart.sn/products/550266203-auto-top-off-for-saltwater-aquarium-water-ato-system-both)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-03-04*