---
product_id: 550266203
title: "Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue"
brand: "useek"
price: "₪249"
currency: ILS
in_stock: true
reviews_count: 13
category: "Useek"
url: https://www.desertcart.co.il/products/550266203-auto-top-off-for-saltwater-aquarium-water-ato-system-both
store_origin: IL
region: Israel
---

# Nano 0.7in compact size Easy all-in-one installation QST real-time refill control Auto Top Off for Saltwater Aquarium Water ATO System for Both Reef and Fresh Tank - Blue

**Brand:** useek
**Price:** ₪249
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your reef thriving with effortless precision!

## 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?** ₪249 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/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

- • **Plug & Play Setup:** Complete kit ensures hassle-free installation, perfect for both reef and freshwater tanks.
- • **Smart Safety Alerts:** QST technology detects refill anomalies, stopping the pump to avoid overflows and dry runs.
- • **Ultra-Compact Design:** Sleek 0.7-inch diameter fits discreetly in any rimmed or rimless aquarium without clutter.
- • **Peace of Mind Warranty:** Backed by a two-year warranty and responsive customer support for worry-free ownership.
- • **Precision Water Leveling:** Automatically maintains stable water levels to prevent salinity spikes and protect your aquatic ecosystem.

## Overview

The Useek Auto Top Off (ATO) System is a compact, smart water level controller designed for both saltwater and freshwater aquariums. Its nano-sized sensor and QST technology ensure precise, real-time water top-offs, preventing salinity fluctuations and protecting aquatic life. Easy to install and backed by a two-year warranty, it’s the perfect upgrade for aquarium enthusiasts seeking stability and convenience.

## 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 |
|---------------|-------|
| ASIN | B0CFVWDKMC |
| ASIN  | B0CFVWDKMC |
| Best Sellers Rank | #8,177 in Pet Supplies ( See Top 100 in Pet Supplies ) #11 in Aquarium Water Pumps |
| Brand Name | Useek |
| Color | Blue |
| Customer Reviews | 4.0 4.0 out of 5 stars (619) |
| Date First Available | May 15, 2023 |
| Date First Available  | May 15, 2023 |
| Included Components | Pump |
| Item Package Dimensions L x W x H | 6.46 x 6.34 x 2.68 inches |
| Item Weight | 0.4 Kilograms |
| Item model number | AT-200 |
| Item model number  | AT-200 |
| Manufacturer | Useek |
| Manufacturer  | Useek |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Model Name | Blue-1 |
| Package Dimensions  | 6.46 x 6.34 x 2.68 inches; 14.07 ounces |
| Specific Uses for Product | Reef and Freshwater Aquariums |
| Style | Modern |
| Target Audience Keyword | fish |
| Warranty Description | 1 |

## 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.

### ⭐ Buyer beware! Designed to break. Low grade disposable product.
*by A***R on February 10, 2025*

I've now purchased 3 times. All 3 of these are absolutely garbage. They work for ruffly 1 to 6 months and then ultimately fail. Reviews say it's great, but notice none of the reviews mention "Years of use". Longevity wise, this gets 1 out of 10. Waste of money. The pump is a 2 out of 10. It's slow, small and breaks easily. It's the kind of pump you'd expect to pay about $1 for. The sensors are NOT water proof and in fact the sensors will take in water and then create a film inside that destroys the sensor. All in all, this is an epic waste of money. Amazon should be ashamed to sell this product, as it's designed to break and you will need to replace it again and again and again. Quite frankly, I'd like my cash back. This is a scam product in which I have 3 of. 3 is enough to prove a point. If the seller or anyone at Amazon would care to interject, maybe we could establish some accountability. For this product, there is none. Buyer beware. This is a disposable product with a shirt lifespan. Absolutely rubbish.

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

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*Product available on Desertcart Israel*
*Store origin: IL*
*Last updated: 2026-02-18*