---
product_id: 424325871
title: "Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display Thermostat External Temperature Controller"
brand: "yofoths"
price: "¥5537"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/424325871-adjustable-mini-aquarium-heater-0-5-1-2-3-gallon
store_origin: JP
region: Japan
---

# 0.5-3 Gallon Capacity Overheating Protection 10W/20W/30W Power Options Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display Thermostat External Temperature Controller

**Brand:** yofoths
**Price:** ¥5537
**Availability:** ✅ In Stock

## Summary

> 🐠 Keep Your Aquatic World Cozy and Safe!

## Quick Answers

- **What is this?** Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display Thermostat External Temperature Controller by yofoths
- **How much does it cost?** ¥5537 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/424325871-adjustable-mini-aquarium-heater-0-5-1-2-3-gallon)

## Best For

- yofoths enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Overheating protection keeps your aquatic friends safe and sound.
- • **Compact & Mighty:** Designed for small tanks, this heater packs a punch without taking up space.
- • **User-Friendly Setup:** External controller means no wet hands and hassle-free adjustments.
- • **Versatile Compatibility:** Perfect for both freshwater and saltwater environments, catering to a variety of aquatic life.
- • **Smart Temperature Control:** Intelligent memory function ensures your fish stay cozy, even after power interruptions.

## Overview

The Adjustable Mini Aquarium Heater is a compact and efficient heating solution for small fish tanks ranging from 0.5 to 3 gallons. With power options of 10W, 20W, and 30W, it features an intelligent memory function, overheating protection, and an external temperature controller for easy use. Suitable for both freshwater and saltwater environments, this heater ensures optimal growth conditions for various fish species.

## Description

Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display Thermostat External Temperature Controller

## Features

- Small And Powerful: This mini aquarium heater is about 2inch long, and is super small. It is specially designed for small fish tanks and does not occupy any space. Upgrade the chip to make the temperature sensing more sensitive and the temperature rise more accurate
- Intelligent Memory Function: After setting the target temperature, the power is suddenly turned off, and the target temperature remains unchanged after turning on the power again
- Overheating Protection: If the water temperature exceeds 95°F, the error code "HI" appears, the heater stops working, and when it returns to below 95°F, the error code disappears and it starts working again
- External Controller: External temperature controller, no need to get your hands wet, no need to buy other controllers, 52 inch long power cord, easy to install, easy to control
- Widely Used: Suitable for freshwater and saltwater, meet the growth temperature for turtle, Fighting fish, Dwarf Gourami, Koi, Corridors, Paradise Fish, Clownfish, swordtail

## Images

![Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display Thermostat External Temperature Controller - Image 1](https://m.media-amazon.com/images/I/61xtnDOKsnL.jpg)

## Available Options

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

## Questions & Answers

**Q: I can increase the temperature with a short press but how do I lower the  temperature?**
A: Keep clicking the button until it reaches the highest temp, and it will restart to the lower temps and go up with each button press again.

**Q: How do I turn this back to the Fahrenheit setting?**
A: 1. First make sure the fish tank heater is not plugged in
2. Press and hold the button and plug it in to convert Celsius to Fahrenheit.

**Q: Can you attach this to a plastic tub safely?**
A: Not sure... I attached it to glass, but I can't imagine that it would get hot enough to hurt anything. My heater is only a 10 watt however.

**Q: What wattage for 10 gallon?**
A: It is more suitable to choose 100W.

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**Shop now:** [https://www.desertcart.jp/products/424325871-adjustable-mini-aquarium-heater-0-5-1-2-3-gallon](https://www.desertcart.jp/products/424325871-adjustable-mini-aquarium-heater-0-5-1-2-3-gallon)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-15*