I want to get some corys for my planted 20 long. I have 1 CT Betta, and 2 Zebra Nerites in it right now. My Betta has an awesome personality and tolerates other fish really well. I'm having trouble deciding which corys (size wise) will be ok in this tank. I've been reading about different ones, and asked questions at my LFS. I like juliis, albinos and pandas. I'm just curious how many I could keep without overstocking. I know they need to be in groups, but what's a good number to at least start off with?? I'd like to keep it to one type tho. Any help would he awesome. Thanksssss