ok guys bare with this noob here, the only fish I've ever messed with have been on the end of my fishin line . my little cousin wants an aquarium and I volunteered to get it, learn about it all and it will be kept at my house. I got the sudden urge to get one a few weeks ago and now I have a good excuse to finally get one lol! now ive done some research on a bit of stuff but I'm still a noob about it all. my girlfriends coworker has to look when he gets home but he believes he has a 20 or 30 gallon tank he's gonna give me. I was thinking about this setup 2 maybe 3 - Cory Cat 4 or so Guppy and either 2 Glassfish or 2 Aphyosemion austral not sure if I would be over crowding in a 20 gallon if i added more than the Cory cats and guppy. is this to many fish in the tank? what would be a good combo of these fish? I know a few of them are supposed to have so many fish like guppies. these numbers are just preliminary and I will adjust accordingly. let me know, if I get the 20 gallon and 30 gallon tank, what fish from above I could get and how many I should have without overstocking, thanks in advance guys!