---
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: "294 zł"
currency: PLN
in_stock: true
reviews_count: 9
category: "Most Aqua"
url: https://www.desertcart.pl/products/647590394-aquarium-ato-dual-sensor-upgraded-pro-water-refilling-kit-auto
store_origin: PL
region: Poland
---

# 70 GPH max flow rate 3m max pump head 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:** 294 zł
**Availability:** ✅ In Stock

## Summary

> 💧 Keep your aquarium flawless—automate the essentials, impress your aquatic community!

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

- • **Anti-Overflow Safety:** Built-in flood prevention protects your investment and home from water damage.
- • **Smart Optical Sensor:** Ensures precise water level detection for worry-free tank maintenance.
- • **Powerful Whisper Pump:** Delivers up to 70 gallons per hour with ultra-quiet operation—your fish won’t even notice.
- • **Innovative Tube Holder:** Patent-designed holder secures refill and air tubes neatly, reducing clutter and hassle.
- • **Reliable 90-Day Warranty:** Confidence backed by MostAqua’s dedicated customer support and satisfaction guarantee.

## Overview

The MostAqua Aquarium ATO200 is a compact, dual-sensor automatic top-off system designed for freshwater and saltwater tanks. Featuring an upgraded optical sensor and a whisper-quiet pump with a 3-meter head and 70 GPH flow rate, it maintains optimal water levels while preventing overfills. Its patented tube holder streamlines setup, and a 90-day warranty ensures peace of mind for professional aquarium enthusiasts.

## Description

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

Review: Life savor, or back - I have been picking up jugs of water for years to refill my saltwater tank and keep it at the right level. THIS product has SAVED my back! Works extremely well the hose it comes with seems better then most hoses you usually get with these types of items , great price, and was easy to install! 10/10 recommend!
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 | Automatic Water Top-Off |
| Best Sellers Rank | #152,989 in Pet Supplies ( See Top 100 in Pet Supplies ) #535 in Aquarium Water Pumps |
| Brand | MostAqua |
| Brand Name | MostAqua |
| Color | Clear |
| Customer Reviews | 3.6 out of 5 stars 18 Reviews |
| Item Weight | 0.37 kg |
| Manufacturer | MostAqua |
| Manufacturer Part Number | MA100 |
| Model Number | ATO200 |
| Number of Items | 6 |
| Pet Type | Fish |
| Special Feature | Automatic Water Top-Off |
| Target Species | Fish |
| Unit Count | 1 Count |
| Vivarium Type | Aquarium |

## Product Details

- **Brand:** MostAqua
- **Color:** Clear
- **Item Weight:** 0.37 kg
- **Manufacturer:** MostAqua
- **Number of Items:** 6
- **Pet Type:** Fish
- **Unit Count:** 1 Count
- **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)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Life savor, or back
*by B***Y on July 3, 2026*

I have been picking up jugs of water for years to refill my saltwater tank and keep it at the right level. THIS product has SAVED my back! Works extremely well the hose it comes with seems better then most hoses you usually get with these types of items , great price, and was easy to install! 10/10 recommend!

### ⭐ 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.

### ⭐⭐⭐⭐⭐ 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

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-10-25*