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DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker



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  • 🐠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!

Specification: DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

Package Dimensions

5.43 x 2.8 x 2.28 inches, 5.11 Ounces

Item model number


Date First Available

July 17, 2020



5 reviews for DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker

4.8 out of 5
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  1. Amazon Customer

    Great for 1gal betta tanks anything else it’s not strong enough . Also have 1 in my 3 gal betta tank and the water still feels cold

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  2. David Schou

    This is a good small tank heater. Have it in a 5 gallon beta tank. Stick on thermometer does not seem to work but it was included with purchase. Tank heater works well and shuts off once tank water reaches 78 degrees.

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  3. Kathleen Clipp

    Super easy to set up and works really quickly. The only thing I didn’t like was the sticker thermometer, the colors are really hard to see so I’m wasn’t positive of where the heat was at, so I used a different one, and it was right at 78 degrees, so the heater works very well. Maybe I just have a faulty sticker or it’s just hard to read on the plastic wall of my tank. Anyway, the heater is what’s important, and it works, great for the money, and would definitely recommend.

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  4. lynnette

    I bought this for two small betta tanks that I have, the tanks hold approximately half a gallon of water each. I have to admit these heaters are probably a little big for the tank but they do a fantastic job of heating the water. The thing I like most about these little heaters is the fact that they are set to a permanent temperature of 78°, so you don’t have to worry about children turning up the heaters and accidentally killing your pets. The only issue I have is the tape thermometers don’t work very well. I do have them taped to the outside of the tanks but it’s extremely hard to see the markings or highlights of the temperature.

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  5. Mike

    **Update- this heater keeps a rock solid temperature and works well in
    a 5 gal tank. Fyi- before doing a water change, be sure to unplug it and
    afterwards give it 15-20 mins before plugging it back in. This will let the
    glass cover stabilize and minimize a change of it cracking. Good heater!!

    This is a pretty good small heater. This is smaller than a traditional
    aquarium heater, and you can’t set the temperature as its preset.
    (I did buy the temp adjustable DaToo as a backup in case this one didn’t
    work out or happened to fail)
    I have found that it does not run at the stated 78 degrees, as the room
    temp seems to affect it. In a 5 gallon tank, with the room temp at
    76.4 degrees, the heater warms the water to 80.4 degrees and keeps it
    rock steady at that temp. It tends to cycle ON for 4 minutes, then
    turn off for 12-13 mins. The red ‘ON’ LED is quite dim to see, the
    green OFF LED is a bit brighter, and the cord is on the short side.
    Am using for a Betta and so far so good, will be keeping an eye on it
    for reliability and how accurate it maintains temp.

    Before this, I was using one of those constant-on 5-watt heaters,
    in a 2.5 gallon tank. It did a good job but tended to overheat the
    water if left on constant. A work around was to use a electric outlet
    timer- set for 30mins on and 1hr off was able to
    maintain a stable temp without overheating.

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    DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker
    DaToo Mini Aquarium Heater 25W Small Fish Tank Heater 25 Watt with Free Thermometer Sticker


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