Tetra HT Submersible Aquarium Heater

I bought three of these for my mini tanks (two 5g and a 2g) and started by putting one in the 2g overnight to test if it would overheat - it did not. It kept it at 78deg just as advertised. Then last night I put one in a 5g, and did the same. So as for the advertised ‘2g to 10g’, I can attest to it working properly in a 2g and a 5g. But my 10g is not currently set up… maybe an update someday soon. :) Update: I have been these in 2 five gallon tanks for a few weeks now. I check the temperature in both tanks twice per day. Dead on 78* every time, and the temperature in my house tends to yo-yo between 60* and 70* throughout the day. I have the tanks set up such that the intake for the filter and the outflow are at opposite ends of the tank, and the heater is in the middle. This gives it the best opportunity to do its job… this might have something to do with other peoples bad experiences…(?) Update 2: I tried using one of these on my 10 gallon tank, and it couldn't get to 78°. Maybe in a tank with no water movement, it might work...? I bought the next one up and it works perfectly.

Mini akvaryumuma uydu. Çok rahatım. Balığım üşüdü mü diye düşünmüyorum. 👍🏻

Excelente producto! Lo compré para usarlo en la tina de agua de mi tortuga que necesita estar entre 24° - 27° C y en épocas de frío baja mucho la temperatura. Mantiene la temperatura deseada calentando aprox. 60L de agua. Mi tortuga y yo estamos felices con la compra :)

Funcional y mantiene el agua de mi pecera a buena temperatura, practico, y fácil de usar

it works fine. it keeps my tank around 77-78. i only use for a week but seems ok. the betta fish i have dont seem to have any problem with it. the cable is long enough. i would recommend for a small tank 5 gallon max 10 gallon. i wish there was a button to control the temperature as i would want it slightly hotter but this temperature is ok.