--- product_id: 218046034 title: "DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker" brand: "datoo" price: "€ 14.29" currency: EUR in_stock: true reviews_count: 12 category: "Da Too" url: https://www.desertcart.hr/products/218046034-datoo-mini-aquarium-heater-25w-small-fish-tank-heater-25 store_origin: HR region: Croatia --- # 0.2 inch ultra-compact size 25W precise heating power Quartz glass explosion-proof durability DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker **Brand:** datoo **Price:** € 14.29 **Availability:** ✅ In Stock ## Summary > 🔥 Keep your betta cozy with the tiniest powerhouse in town! ## 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?** € 14.29 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/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 - • **Visual Heat Status:** Red heating light and green ready light keep you effortlessly in the loop. - • **Safety First, Always:** Rubber-sealed, explosion-proof quartz glass ensures zero leaks and maximum peace of mind. - • **Space-Saving Mini Marvel:** World’s smallest 25W heater fits tanks from 1 to 6 gallons without cramping your fish’s style. - • **Bonus Thermometer Sticker:** Free thermal tape included for quick temp checks—because your fish deserve the best. - • **Effortless Perfect Temperature:** Preset 78°F keeps your betta’s habitat ideal—no fiddling required. ## Overview The DaToo Mini Aquarium Heater 25W is a compact, preset 78°F heater designed for small tanks (1-6 gallons). Featuring explosion-proof quartz glass and a rubber seal for safety, it maintains a stable tropical environment effortlessly. Its ultra-slim 0.2-inch profile maximizes tank space, while indicator lights and a free thermometer sticker provide easy monitoring. Backed by a 1-year warranty, it’s the smart choice for millennial fish enthusiasts who want hassle-free, reliable warmth. ## Description desertcart.com : DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker : Pet Supplies Review: Heats small tank, stays in place, temperature not adjustable - Have had it plugged in and running for a few days in my 1.5-gallon tank, and it is working great! The red light turns on when heating; green light when it's at temperature (~78° F), which I've been monitoring via a digital thermometer (temperature seems to stay right between 77.5° and 78.5°). I'm not able to adjust the temperature, but 78° is right around the temperature I'll be needing, anyhow. This heater keeps the temperature in the target range, whereas the 10W heater that came with the tank couldn't, as the water was always way too cold previously. The included thermal tape thermometer kind of works, but is not very accurate and it's really hard to discern the colors; it's nice to have, but I'd recommend something else if you need more temperature accuracy than ±5° and you have a larger tank or a colder room. Also, the suction cup fits the heater well and is nice and soft, holding to the plastic tank really well! (I was a little impressed with that, actually.) Review: Worth buying for a smaller tank - It’s a nice size, works very well. It looks good, sticks well to the inside of the tank. I’ve had it for 4-5 months and I’m glad I bought it. It’s a preset temperature so you don’t have to worry about that. A must have for a smaller betta fish tank. 10/10 ## 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 | | ASIN | B0893T67LX | | Additional Features | High Accuracy | | Age Range Description | Adult | | Best Sellers Rank | #1,944 in Pet Supplies ( See Top 100 in Pet Supplies ) #2 in Aquarium Heaters | | Brand Name | DaToo | | Color | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (5,572) | | Date First Available | July 17, 2020 | | 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 | | Item model number | DT-25A | | LowerTemperature Range | 78 Degrees Fahrenheit | | Manufacturer | DaToo | | Manufacturer | DaToo | | Model | DT-25A | | Model Name | DT-25A | | Outer Material | Plastic | | Package Dimensions | 5.47 x 2.72 x 2.36 inches; 4.66 ounces | | Part Number | DT-25A | | Power Source | Corded Electric | | Product Care Instructions | Wipe Clean | | Reusability | Reusable | | Style Name | Basic | | UPC | 745408757995 | | Unit Count | 1.0 Count | | Upper Temperature Range | 78 Degrees Fahrenheit | ## 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:** 1.0 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 ### ⭐⭐⭐⭐⭐ Heats small tank, stays in place, temperature not adjustable *by W***E on February 1, 2026* Have had it plugged in and running for a few days in my 1.5-gallon tank, and it is working great! The red light turns on when heating; green light when it's at temperature (~78° F), which I've been monitoring via a digital thermometer (temperature seems to stay right between 77.5° and 78.5°). I'm not able to adjust the temperature, but 78° is right around the temperature I'll be needing, anyhow. This heater keeps the temperature in the target range, whereas the 10W heater that came with the tank couldn't, as the water was always way too cold previously. The included thermal tape thermometer kind of works, but is not very accurate and it's really hard to discern the colors; it's nice to have, but I'd recommend something else if you need more temperature accuracy than ±5° and you have a larger tank or a colder room. Also, the suction cup fits the heater well and is nice and soft, holding to the plastic tank really well! (I was a little impressed with that, actually.) ### ⭐⭐⭐⭐⭐ Worth buying for a smaller tank *by K***E on March 29, 2026* It’s a nice size, works very well. It looks good, sticks well to the inside of the tank. I’ve had it for 4-5 months and I’m glad I bought it. It’s a preset temperature so you don’t have to worry about that. A must have for a smaller betta fish tank. 10/10 ### ⭐⭐⭐⭐⭐ Great for small aquariums *by M***H on March 29, 2026* Works really well for a 2.5 gallon aquarium. Keeps a steady temperature. Great value for the price! ## 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/218046034-datoo-mini-aquarium-heater-25w-small-fish-tank-heater-25](https://www.desertcart.hr/products/218046034-datoo-mini-aquarium-heater-25w-small-fish-tank-heater-25) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-17*