Originally Posted by Oohitsae
Hmm, I'd buy a heater if possible and cycle that spare 10...then get either a trio or two pair of some good quality guppies (something desireable, not the normal type from pet stores) or get some endlers, tigers go for about $20 for 2 pair and N class go for about the same. Depending on the type of guppy, some can go for as high as 100 for 2 pairs.
That's what I was going to reccomend. Buy some good quality live bearers.