---
product_id: 464164991
title: "AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks"
brand: "aquamiracle"
price: "€ 47.11"
currency: EUR
in_stock: true
reviews_count: 7
url: https://www.desertcart.gr/products/464164991-aquamiracle-adjustable-30w-small-aquarium-heater-submersible-fish-tank-heater
store_origin: GR
region: Greece
---

# 2.36" mini size Dry run protection 64-93°F range AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks

**Brand:** aquamiracle
**Price:** € 47.11
**Availability:** ✅ In Stock

## Summary

> 🐠 Keep your aquatic friends cozy and safe!

## Quick Answers

- **What is this?** AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks by aquamiracle
- **How much does it cost?** € 47.11 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/464164991-aquamiracle-adjustable-30w-small-aquarium-heater-submersible-fish-tank-heater)

## Best For

- aquamiracle enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Automatic shut-off to prevent overheating.
- • **Versatile Use:** Ideal for aquariums, turtles, and plant seedlings.
- • **Compact Design:** Perfect for nano tanks and easy to hide!
- • **Memory Function:** Remembers your last settings after power cuts.
- • **Precision Heating:** Maintains temperature within 1°F accuracy.

## Overview

The AquaMiracle Adjustable 30W Small Aquarium Heater is a compact and efficient heating solution for 4-6 gallon tanks. With a precise temperature range of 64-93°F and advanced safety features, it ensures your aquatic pets thrive in a stable environment. Its memory function and versatility make it perfect for both freshwater and marine setups.

## Description

Full description not available

## Features

- SUPER MINI SIZE – This small aquarium heater is “thumb size” - only 2.36” (6cm) in length. Great for nano tanks / betta tanks. The innovative super mini size perfectly solves the headache of the fish keepers on the traditional heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F, for 4-6 Gallon tanks.
- ACCURATE TEMPERATURE – Thanks to the intelligent inverter technology, with the in-built chips this thermostat keeps the heater at a constant temperature at an accuracy of 1F, much more accurate than the traditional knob-controlled heaters. The thermostat shows 2 readings – the current temperature and the set temperature – very easy to operate.
- DRY RUN / OVERHEATING PROTECTION – Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level or when the water temperature exceeds 97F. You are free from “cooking fish”!
- MEMORY FUNCTION – The last setting is stored in the thermostat. In case of a power cut, when the power recovers the heater will follow the last setting.
- MULTIPLE USES – This heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work for turtles, pet fountains, and plant seedling.

## Images

![AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks - Image 1](https://m.media-amazon.com/images/I/61gm+rxBmwL.jpg)
![AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks - Image 2](https://m.media-amazon.com/images/I/71Z-YpZDOiL.jpg)
![AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks - Image 3](https://m.media-amazon.com/images/I/71Mkn7UkltL.jpg)
![AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks - Image 4](https://m.media-amazon.com/images/I/71gSCn1ueRL.jpg)
![AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks - Image 5](https://m.media-amazon.com/images/I/71u2ZaPXmXL.jpg)

## Available Options

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

## Questions & Answers

**Q: I’m getting it for my cat’s 5” cube fountain, can i get the 30w one for the dry run feature? or i should go with the 10w for the tiny fountain**
A: this is a heater
it's about 3" in length 
and you can monitor the temp which sits outside of the container

**Q: What is the diameter of this heater?**
A: The diameter is 2cm (0.8").

**Q: My heater is displaying “ 8,8,8 and when I click the button nothing happens, how do I fix this?**
A: Well, that's a tough one.  The error codes are like E1, E2 etc.  so its not that.  Assuming the device is under water, and electricity is flowing to the heater, the only thing I would try is unpluging it, wait a minute or two and plug it back in.  Sorry I could not help more.

**Q: Does it turn off once it reaches the temp the user sets it at?**
A: You can see the temperature displayed at all time. It is maintained at the set temperature.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Doing its job!
*by E***H on December 15, 2024*

The media could not be loaded. I absolutely love this little heater! It’s the perfect size for my betta tank, and it does exactly what it promises. The adjustable temperature feature is spot-on, and it holds the temperature consistently without any fluctuations. I was pleasantly surprised by how reliable it is for such a compact heater. It’s discreet, easy to install, and doesn’t take up much space in the tank. If you’re looking for an affordable and efficient heater for your betta or small aquarium, this is definitely the one! I’ve attached a video showing how well it works in my tank.

### ⭐⭐⭐⭐⭐ Tiny yet mighty!
*by L***G on October 21, 2023*

Sam, our unexpected Betta fish birthday gift for our 7-year-old, quickly became a beloved member of our family. To ensure his happiness and comfort in his new home, we had to learn the ropes of Betta care. It was surprising to discover that these little fish, often sold in deli containers at pet stores, require a considerable amount of care. During our research, we learned that Betta fish thrive in water temperatures between 78 to 82 degrees Fahrenheit, and achieving this meant we needed 5 watts of heating power per gallon. That's why we found the 20-watt heater to be a perfect match for our 4-gallon tank.This compact heater was an ideal solution for our uniquely shaped round tank, where our only option was a fully submersible heater. Many other models we came across were bulky and had no suitable attachment points. However, this heater's strong suction cup allowed us to discreetly position it near the rim of the tank, preserving the tank's aesthetics. Not only has it maintained a consistent water temperature of a perfect 80 degrees, but it's also safe to touch, as Sam often swims close to it without harm.One feature we appreciate is the easily visible digital display, which helps us monitor the temperature and ensure Sam's safety. However, my one concern is the auto-shutoff setting, which is set at a rather high 97 degrees. Knowing that Bettas cannot survive in water temperatures exceeding 86 degrees, I can't help but worry about the possibility of returning home to an overheated tank.

### ⭐⭐⭐⭐⭐ Works well in a small tank
*by L***E on April 27, 2025*

We use this in a small tank that holds mainly plants. This unit works well. Keeps the temperature right on. The digital readout is nice.

## Frequently Bought Together

- AquaMiracle Adjustable 30W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 4-6 Gallon Tanks
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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-06*