---
product_id: 218046034
title: "DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker"
brand: "datoo"
price: "€ 14.83"
currency: EUR
in_stock: true
reviews_count: 13
category: "Da Too"
url: https://www.desertcart.gr/products/218046034-datoo-mini-aquarium-heater-25w-small-fish-tank-heater-25
store_origin: GR
region: Greece
---

# 0.2 inch ultra-compact size 25W precise heating power rubber seal & quartz glass safety DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

**Brand:** datoo
**Price:** € 14.83
**Availability:** ✅ In Stock

## Summary

> 🐠 Keep your fish cozy in style — the mini heater that’s making waves!

## Quick Answers

- **What is this?** DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker by datoo
- **How much does it cost?** € 14.83 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/218046034-datoo-mini-aquarium-heater-25w-small-fish-tank-heater-25)

## Best For

- datoo enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last & Safe:** Explosion-proof quartz glass with premium rubber sealing ensures zero leaks and ultimate durability.
- • **Instant Visual Feedback:** Red/green indicator lights show heating status at a glance—confidence in every degree.
- • **Mini Heater, Maximum Space:** World’s smallest 25W heater fits discreetly in 1-5 gallon tanks, maximizing swimming room.
- • **Effortless Perfect Temperature:** Auto-maintains ideal 78℉ for tropical & betta fish—no settings needed.
- • **Bonus Thermometer Sticker Included:** Track your tank’s temp easily and stay ahead of your fish’s comfort needs.

## Overview

The DaToo Mini Aquarium Heater 25W is a compact, ultra-precise heating solution designed for small fish tanks (1-6 gallons). It automatically maintains a stable 78℉ temperature ideal for bettas and tropical fish, featuring a durable quartz glass body and safe rubber sealing to prevent leaks. Its tiny 0.2-inch profile maximizes tank space, while included thermometer stickers and clear indicator lights provide easy monitoring. Backed by a one-year warranty, it’s the trusted choice for professional fish keepers who demand reliability and style.

## Description

desertcart.com: DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker : Pet Supplies

Review: Bought Three and All Have Been Flawless - ★★★★★ 5/5 Stars I've purchased three of these DaToo Mini Aquarium Heater 25W units and have been using them for quite a while now. All three have worked flawlessly from day one, which is exactly what I look for in an aquarium heater. They are compact, easy to install, and fit nicely in smaller tanks without taking up much space. Most importantly, they maintain stable temperatures and have been completely reliable. I use them in tanks housing livebearers and fry, so consistent heating is important, and these heaters have performed perfectly. My only minor complaint is the suction cup design. I wish the suction cup was permanently attached to the black plastic clip because it can occasionally disconnect when I'm moving plants around or cleaning the tank. It's not a major issue and only takes a second to reconnect, but it would be nice if it were a little more secure. Overall, after owning three of these heaters and having a great experience with all of them, I can confidently recommend them to anyone looking for an affordable and dependable heater for a small aquarium.
Review: It works well. - For the price I'm actually impressed. This little heater works like a charm and my beta fish loves it. Gives him a little nightlight at night and he really is enjoying warmer water. It is adjustable but on the side of the tank where I have it it isn't super stable, it likes to move around if the cord is touched. But the suction cup works likes its supposed to. At the price I paid I have no complaints, I'm just glad it works. Don't expect it to last forever but who knows, china is stepping up their A game on stuff lately.

## Features

- 25W Betta Aquarium Heater: Creating and maintaining a perfect and comfortable water temperature for our cute fish is not easy, which requires a lot of effort. Now DaToo MINI 25W Aquarium Heater can help you make this easier. Precise and constant temperature, no need to set, keep the temperature of fish habitat in the best state at all times. You will find it very easy and happy to take care of pet fish！
- Precise And Constant Temperature: No need to set, DaToo Fish Tank Heater will automatically keep the water temperature of the fish habitat at 78℉. This temperature is very suitable for betta and most tropical fish. When the water temperature is lower than 78℉, the heater starts to heat and the red light is on. When the temperature reaches 78℉, the heater stops heating and the green light is on. DaToo will always maintain this comfortable temperature for your beloved fish!
- The Smallest 25W Betta Heater: For most fish lovers who have small fish tanks of 1 to 5 gallons, a small heater means more space for fish. This is the smallest 25W aquarium heater on the market, only 0.2 inches. No matter how small your fish tank is, it can be used perfectly in it, and you can't even find it. Very MINI!!
- Safe And Durable: Unlike traditional plastic seals, DaToo uses a rubber sealing layer, which ensures that DaToo has better sealing and safety performance, and will never leak electricity or water. Quartz glass material, explosion-proof and crack-proof, more sturdy and durable, without worrying about damage.
- One Year Warranty & Satisfaction Guarantee: This heater is ideal for 1 to 6 gallon small glass or acrylic desktop aquariums. When in use, it needs to be submerged 100% in water. We provide one year warranty and 24 hours professional customer service. Buy With Confidence!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0893T67LX |
| Additional Features | High Accuracy |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #3,440 in Pet Supplies ( See Top 100 in Pet Supplies ) #3 in Aquarium Heaters |
| Brand | DaToo |
| Brand Name | DaToo |
| Color | Black |
| Customer Reviews | 4.4 out of 5 stars 5,908 Reviews |
| Display Type | Digital |
| EU Spare Part Availability Duration | 1 years |
| Immersion Depth | 0.9 inches |
| Included Components | Free Thermometer Sticker |
| Indoor Outdoor Usage | Indoor |
| Item Length | 4.9 inches |
| LowerTemperature Range | 78 °F |
| Manufacturer | DaToo |
| Model | DT-25A |
| Model Name | DT-25A |
| Outer Material | Plastic |
| Part Number | DT-25A |
| Power Source | Corded Electric |
| Product Care Instructions | Wipe Clean |
| Reusability | Reusable |
| Special Feature | High Accuracy |
| Style Name | Basic |
| UPC | 745408757995 |
| Unit Count | 1 Count |
| Upper Temperature Range | 78 °F |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** DaToo
- **Color:** Black
- **Display Type:** Digital
- **Included Components:** Free Thermometer Sticker
- **Outer Material:** Plastic
- **Power Source:** Corded Electric
- **Product Care Instructions:** Wipe Clean
- **Special Feature:** High Accuracy
- **Unit Count:** 1 Count

## Images

![DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker - Image 1](https://m.media-amazon.com/images/I/61u1WDt2FpL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Bought Three and All Have Been Flawless
*by _***_ on June 19, 2026*

★★★★★ 5/5 Stars I've purchased three of these DaToo Mini Aquarium Heater 25W units and have been using them for quite a while now. All three have worked flawlessly from day one, which is exactly what I look for in an aquarium heater. They are compact, easy to install, and fit nicely in smaller tanks without taking up much space. Most importantly, they maintain stable temperatures and have been completely reliable. I use them in tanks housing livebearers and fry, so consistent heating is important, and these heaters have performed perfectly. My only minor complaint is the suction cup design. I wish the suction cup was permanently attached to the black plastic clip because it can occasionally disconnect when I'm moving plants around or cleaning the tank. It's not a major issue and only takes a second to reconnect, but it would be nice if it were a little more secure. Overall, after owning three of these heaters and having a great experience with all of them, I can confidently recommend them to anyone looking for an affordable and dependable heater for a small aquarium.

### ⭐⭐⭐⭐⭐ It works well.
*by F***R on July 3, 2026*

For the price I'm actually impressed. This little heater works like a charm and my beta fish loves it. Gives him a little nightlight at night and he really is enjoying warmer water. It is adjustable but on the side of the tank where I have it it isn't super stable, it likes to move around if the cord is touched. But the suction cup works likes its supposed to. At the price I paid I have no complaints, I'm just glad it works. Don't expect it to last forever but who knows, china is stepping up their A game on stuff lately.

### ⭐⭐⭐⭐⭐ Cute, small, easy to tell that it's working perfectly
*by I***R on August 6, 2024*

I'm using this for a 3-gallon shrimp tank. It's tiny. It's cute. There is a very belt-and-suspenders approach to being sure this thing is working properly. It lights a little even when it's not heating the water (I expect it's not heating the water when the room is nearly 90 degrees in August). The light is really only visible when the tank is dark and there isn't too much light in the room, but it's a small square by the bottom, just to clearly indicate it is working. I like that assurance. The little thermometer, which is also tiny and out of the way, would be another indicator, again if it weren't August and showing the water temperature in the 80s without the heater. So you can be certain, if there is a problem, you will know. But the ambient room temperature does lead to another point. It's small and I don't think it's that powerful. For me, the room is never going below 70 degrees. I'm in an apartment building with a lot of elderly residents, and the super needs to keep the place warm bordering on hot for them. I need the heater. The water will get too cold for the shrimp without it. But not more than say 10 degrees below their comfort level. If you're thinking a tank in say a garage (I know some people who use that as an office and keep a betta there) and you're prone to reasonably cold winters, then this might not be the thermometer for you. The shrimp seem to think it's a nice platform to sit on. I usually find at least one perched on top. I like especially how deep I can store it and the suction cups keep it firmly in place. If I'm only doing a one gallon water change (they're shrimp -- they have a really low bioload so changing a gallon a week is fine) then I can keep it plugged in while doing the water change and it stays fully submerged the entire time.

## Frequently Bought Together

- DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker
- Ultra Fresh Betta Fish Food, Pro Shrimp Patties, 50% Sword Prawns + Akiami Paste Shrimps, All Natural Protein, Rich in Calcium, for Betta's Healthy Development and Cleaner Water, 0.7 oz
- Tetra BettaSafe, Aquarium Water Conditioner For Bettas, 1.69-Ounce, 50ml, Golds & Yellows (16837)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-08-26*