---
product_id: 647590394
title: "Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System"
brand: "mostaqua"
price: "297.15 DT"
currency: TND
in_stock: true
reviews_count: 6
category: "Most Aqua"
url: https://www.desertcart.tn/products/647590394-aquarium-ato-dual-sensor-upgraded-pro-water-refilling-kit-auto
store_origin: TN
region: Tunisia
---

# 70 GPH max flow rate 3m max pump head height Upgraded optical sensor Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System

**Brand:** mostaqua
**Price:** 297.15 DT
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your aquarium flawless—automate like a pro, never miss a drop!

## Quick Answers

- **What is this?** Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System by mostaqua
- **How much does it cost?** 297.15 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/647590394-aquarium-ato-dual-sensor-upgraded-pro-water-refilling-kit-auto)

## Best For

- mostaqua enthusiasts

## Why This Product

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

## Key Features

- • **Flood-Proof Assurance:** Anti-overfill function protects your aquatic ecosystem from accidental flooding.
- • **Reliable & Worry-Free:** Backed by a 90-day warranty and trusted by aquarists for consistent, fail-safe operation.
- • **Innovative Tube Holder:** Patented design secures refill and air tubes neatly, reducing clutter and installation hassle.
- • **Powerful Yet Whisper-Quiet:** Micro pump delivers up to 70 GPH with a max 3-meter head, maintaining water levels silently.
- • **Precision Water Management:** Smart optical sensor ensures timely, accurate refills—never over or underfill your tank.

## Overview

The MostAqua Aquarium ATO200 is a compact, dual-sensor automatic top-off system designed for both freshwater and saltwater tanks. Featuring an upgraded optical sensor and a whisper-quiet micro pump with a 70 GPH flow rate and 3-meter head, it ensures precise water level maintenance. Its patented tube holder simplifies setup, while anti-overfill protection guarantees safety. Ideal for busy professionals, it offers reliable, hands-free aquarium care with a 90-day warranty.

## Description

The ATO system automatically maintains the water level in the aquarium, ensuring a stable and healthy environment for aquatic life.

Review: Works great - I have several of these they work great (unless snails cover the sensor) make sure to get the dual sensor though had a lot of problems with the single sensor 1
Review: Unreliable ATO - Randomly the sensor does not signal the pump to fill. There are no LED warnings on the sensor when this occurs and the sensor is clean. This faulty ATO requires I look at the sump once a day to make sure it is filling properly. The workaround to this unreliable ATO is to power off and back on and magically watch the pump start filling to the sensor level without issue until another power cycle is required. I highly recommend looking for another ATO for your aquarium needs.

## Features

- 【Smart ATO】Compact design, upgraded safer optical sensor, no matter how long you are away, ATO system can ensure that your tank is refilled in time.
- 【Top Off System】The unit comes with a micro whisper pump, small but powerful, with a maximum head of 3 meters and a maximum flow rate of 70 GPH.
- 【Easy to Use】Anti-overfill function can avoid flooding your fish tank, more reliable.
- 【Patent Design】The patented design of the tube holder can not only fix the re-filling tube but also can be used to hold the air tube.
- MostAqua offer 90 Days warranty. If you are not happy with our Aquarium ATO or receive a defective unit, we will propose you satisfactory resolution. Please feel free to contact with us if any questions or concerns.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CD1LKB67 |
| Additional Features | Lightweight, Saltwater or Freshwater, Self Watering |
| Best Sellers Rank | #29,878 in Pet Supplies ( See Top 100 in Pet Supplies ) #99 in Aquarium Water Pumps |
| Brand | MostAqua |
| Brand Name | MostAqua |
| Color | Clear |
| Customer Reviews | 3.7 out of 5 stars 14 Reviews |
| Included Components | ATO Controller, Water Pump, Power Adapter, Tubing, Tube Holder, User Manual |
| Item Type Name | Aquarium ATO |
| Item Weight | 0.37 Kilograms |
| Manufacturer | MostAqua |
| Manufacturer Part Number | MA100 |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Material Type | Acrylonitrile Butadiene Styrene (ABS) |
| Model Number | ATO200 |
| Product Style | ATO A2 |
| Special Feature | Lightweight, Saltwater or Freshwater, Self Watering |
| Specific Uses For Product | Indoor |
| Style | ATO A2 |
| Target Species | Aquarium |
| Unit Count | 1 Count |
| Vivarium Type | Aquarium |
| Warranty Description | 1 Year Manufacturer |

## Product Details

- **Brand:** MostAqua
- **Color:** Clear
- **Included Components:** ATO Controller, Water Pump, Power Adapter, Tubing, Tube Holder, User Manual
- **Item Weight:** 0.37 Kilograms
- **Manufacturer:** MostAqua
- **Material:** Acrylonitrile Butadiene Styrene (ABS)
- **Special Feature:** Lightweight, Saltwater or Freshwater, Self Watering
- **Specific Uses For Product:** Indoor
- **Style:** ATO A2
- **Vivarium Type:** Aquarium

## Images

![Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System - Image 1](https://m.media-amazon.com/images/I/61fe80bHzLL.jpg)
![Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System - Image 2](https://m.media-amazon.com/images/I/61bwHZhvRqL.jpg)
![Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System - Image 3](https://m.media-amazon.com/images/I/61+cWZnywnL.jpg)
![Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System - Image 4](https://m.media-amazon.com/images/I/61-zoLv-VnL.jpg)
![Aquarium ATO, Dual Sensor Upgraded Pro Water refilling Kit, Auto Top Off for Freshwater Saltwater Aquarium, Fish Tank Automatic Top Off System - Image 5](https://m.media-amazon.com/images/I/61p0I7N0H3L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by A***R on April 20, 2026*

I have several of these they work great (unless snails cover the sensor) make sure to get the dual sensor though had a lot of problems with the single sensor 1

### ⭐ Unreliable ATO
*by D***N on April 18, 2025*

Randomly the sensor does not signal the pump to fill. There are no LED warnings on the sensor when this occurs and the sensor is clean. This faulty ATO requires I look at the sump once a day to make sure it is filling properly. The workaround to this unreliable ATO is to power off and back on and magically watch the pump start filling to the sensor level without issue until another power cycle is required. I highly recommend looking for another ATO for your aquarium needs.

### ⭐ Not reliable, doesn’t sense water level dropping
*by A***R on July 15, 2025*

Not reliable. Randomly will decide to stop working. I’ll notice my reservoir hasn’t moved in a couple of days to find this ató system isn’t working. Other times when my reservoir runs dry there’s no alarm to alert me. I’ve tried replacing the pump but the sensor doesn’t seem to work anymore even though the blue light is on. I’ve been using it for almost two months and need to find another ATO system

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-05-30*