Please help. I am a new Betta owner, and I am trying to get this tank ready to put the Betta fish that I have (currently in a small tank way less than 1 gallon) into a 5 1/2 gallon tank... But I am missing a heater, and I want this set up before he goes in. Right now he must be freezing. But he was sort of dumped on me surprisingly, and I took these past 2 days to read up on Betta care, and I am scared that he may die soon. (Because of the poor accommodations he's in & the water temperature.)
So my question is:
How many watts should the heater be, for a 5 1/2 gallon tank? At the pet store there only were 100 & 50 watts heaters. I will look around for whichever one I need. My bf was saying those were too high. Help?