so i have a guy that wants to trade me piranhas, i have macs, and he has 2 red bellies, my question is would you trade 2 for 2 on that? i mean, i am a red belly fan, but im not sure how fair up the trade would be? and would i be able to keep macs and red bellies together? he said the 2 red bellies he has are the size of his hand, roughly 7-8" and my macs are about 3.5-4.5" i am a little tired of the macs and in activity, and i was originally going to get a school of red bellies before i got the macs. so im at a loss. i guess the biggest factor right now to me is housing, if i can do the red bellies with the macs. only for a little while.