heaters

[BettaBoyz]

i'm keeping a Betta and ADF pair in a gallon tank. as of now they are unheated, and i am going insane trying to figure this out.

what is the smallest heater i can safely fit in the gallon without cooking the fish and frog?

 

[Liz05]

I posted the same question basically in beginner questions. You might want to go check that out. Also, when the weather's decent, my light in the 1 gallon keeps the temperature stable.

 

[Kissifish]

Wal-Mart has a "Junior Heater" that will keep a small tank at 75 degrees. Its not adjustable though. I'd go with a Whisper submersible heater for 5 - 15 gallon tanks. It can be adjusted. I use it in my 2 gallon quarantine/hospital tank.