Is A 50W Nano Heater Ok For A 7.6L Fluval Spec Tank

[shrimptank]

Hi, The tank is about 7.6 litres, I had a Fluval 25w nano heater in there but it was rubbish and barely kept it over 21c when housed in the filter pump compartment (so not in the main tank area), I found the Visi-Therm Heater-Stat 50W 15cm which will fit perfectly ... I just want to get something a bit more powerful as it's in the pump compartment and the room is sometimes cold, so is the 50w ok in such a small tank?

 

[OldMan47]

A 25W heater should be plenty, and then some, for a tank that size, although surface to volume ratio might be starting to become important at such a small size. The 50W has the distinct disadvantage of being big enough to overheat your fish if anything goes wrong with its control system. Have you tried simply adding a thin layer of styrofoam insulation to the back and bottom instead? That way you should be able to use the smaller heater and get the temperatures you want.

 

[iBall]

I'm also looking for anew heater for my flulval edge, 6 gallon tank. I currently have the Fluval 25 watt but I also worry that it doesnt maintain a nice temp now that it's winter. Basically, it su x because it's preset, a 25w heater that allows you to set the target temp should be just fine. Just try to keep a thermometer in the tank because usually the heater will heat the water a couple degrees below its set temperature, so you'll have to play with it.