---
product_id: 486566588
title: "Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W)"
brand: "auomii"
price: "€ 36.68"
currency: EUR
in_stock: true
reviews_count: 13
category: "Auomii"
url: https://www.desertcart.nl/products/486566588-small-submersible-aquarium-heater-adjustable-mini-fish-tank-heater-25
store_origin: NL
region: Netherlands
---

# External LED temperature display 25W precise heating power Overheat & dry-run protection Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W)

**Brand:** auomii
**Price:** € 36.68
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your mini aquatic world perfectly cozy—smart heating, zero hassle!

## Quick Answers

- **What is this?** Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W) by auomii
- **How much does it cost?** € 36.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/486566588-small-submersible-aquarium-heater-adjustable-mini-fish-tank-heater-25)

## Best For

- auomii enthusiasts

## Why This Product

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

## Key Features

- • **Compact Powerhouse:** Ultra-compact design with strong suction cups for effortless, flexible installation anywhere in your tank.
- • **Fish-Friendly Safety:** Built-in overheating and dry-run protection ensures your aquatic friends stay safe and cozy.
- • **Safe & Smart Control:** Adjust temperature externally—no wet hands, no stress, just seamless control.
- • **Real-Time Temperature Monitoring:** LED display on the external controller keeps you instantly informed—ditch the extra thermometer.
- • **Precision Heating, Zero Guesswork:** Maintains your mini aquarium at a perfect, stable temperature with ±0.5°C accuracy.

## Overview

The auomii Small Submersible Aquarium Heater (25W) is a compact, quartz-built device designed for 3-5 gallon tanks. It features an external LED temperature controller for precise, hands-free adjustments and real-time monitoring. With smart memory and automatic shutoff to prevent overheating or dry-run damage, it ensures a safe, stable environment for your fish. Ideal for professional hobbyists seeking reliable, easy-to-install aquarium heating with advanced safety features.

## Description

desertcart.com: auomii Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W) : Pet Supplies

Review: Good little heater 5watt usb - The heater works well with Ziss brine shrimp hatchery. Holds a consistent 78 degrees +- .5 degrees. Buying another for a second hatchery
Review: The best to isolated a fish or a small fish tank - It’s so awesome to have this because you have built in temperature checking it’s definitely value for your money

## Features

- Automatic Constant Temperature: 25W aquarium heater is specially designed for mini fish tank for 3-5 gallon, the heating will be automatically stopped when the set temperature is reached
- External Temperature Controller: Set the temperature via an external controller instead of submerging the hands in water and turning the dial
- Easy to Install: Thanks to the ultra-compact heater with powerful suction cup, it can be easily installed anywhere in the tank
- Easy to Read: The water temperature will be displayed on the external controller in real time, no need another aquarium thermometer
- Overheating Protection: Prevent cooking fish as overheating protection, stop heating automatically when overheating or lack of water

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BDKPVC6X |
| ASIN  | B0BDKPVC6X |
| Best Sellers Rank | #23,614 in Pet Supplies ( See Top 100 in Pet Supplies ) #56 in Aquarium Heaters |
| Brand Name | auomii |
| Breed Recommendation | tortoise turtle tetra betta fish |
| Care Instructions | When there is moss or other dirty on the heater surface and the LED screen, it needs to be cleaned up with soft brush in time |
| Color | black |
| Customer Reviews | 4.3 4.3 out of 5 stars (423) |
| Date First Available | September 8, 2022 |
| Date First Available  | September 8, 2022 |
| Directions | The heater must be fully submersed into the water. The external temperature controller must be kept away from the water as it is not waterproof. |
| Included Components | Submersible Aquarium Heater |
| Item Package Dimensions L x W x H | 5.98 x 4.21 x 2.05 inches |
| Item Weight | 7.8 ounces |
| Item model number | AU-001 |
| Item model number  | AU-001 |
| Manufacturer | auomii |
| Manufacturer  | auomii |
| Material | quartz |
| Model Name | Submersible Aquarium Heater |
| Package Dimensions  | 5.98 x 4.21 x 2.05 inches; 7.83 ounces |
| Size | 25 Watts |
| Specific Uses for Product | Heating pet drinking water, Prevent pet's drinking water from freezing, constant water temperature, external temperature controller |
| Target Audience Keyword | fish |

## Images

![Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W) - Image 1](https://m.media-amazon.com/images/I/61w3C6GQkTL.jpg)
![Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W) - Image 2](https://m.media-amazon.com/images/I/71SvfJ7s93L.jpg)
![Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W) - Image 3](https://m.media-amazon.com/images/I/71Vyb70AtkL.jpg)
![Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W) - Image 4](https://m.media-amazon.com/images/I/711TqEgqJZL.jpg)
![Small Submersible Aquarium Heater,Adjustable Mini Fish Tank Heater 25/50/100/150/200/300 Watts with External Temperature Controller, LED Display, Smart Memory, Used for 1-60 Gallons (25W) - Image 5](https://m.media-amazon.com/images/I/712Xle2O-pL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good little heater 5watt usb
*by A***N on January 29, 2026*

The heater works well with Ziss brine shrimp hatchery. Holds a consistent 78 degrees +- .5 degrees. Buying another for a second hatchery

### ⭐⭐⭐⭐⭐ The best to isolated a fish or a small fish tank
*by R***Y on November 27, 2025*

It’s so awesome to have this because you have built in temperature checking it’s definitely value for your money

### ⭐⭐⭐⭐⭐ Great little heater
*by S***N on November 24, 2025*

Great little nano heater for my nano tanks. I have a 3 gallon. I mainly like the size and that it uses a usb port which I have usb hub and running multiple usb heaters for my tanks. So far no issues with this product and would recommend for nano sized tanks.

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-20*