Quote:
Originally Posted by alessia55
I kept a betta fish for 4 years while in college, and is now living with a friend of mine. I was hoping for something different 
Oh, and I don't mind changing the water and that sort of stuff. I guess what I mean is that I would prefer a hardy fish that can live off of the flakes food and not require a whole lot of specialized care.
Do all fish need a heater? my betta fish was held at room temperature the 4years I had him
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Ok, no betta!

Most fish will be ok with flake food, so you shouldn't have to worry about that. Here's a quick list of some fish that will fit into a 10 gallon (not all at once though):
*guppies/endlers
*some gouramis
*some cories
*neon or cardinal tetras
*harlequin or galaxy rasboras
*platy
Goldfish don't need heaters
While bettas (or other fish) CAN live without a heater, they become more susceptible to disease without it. In the end, a heater would probably save money
Here's my 10 gallon halfmoon (sorry, I thought I had a better picture). It used I house a betta, 3 endlers, and 6 pygmy cories, but I've recently switched it up to 8 guppies.