Once my tank is finally settled (see last post) I'm planning on getting a few different catfish and I'm wondering if anybody has any experience with mixing these... I currently have 12 cory's (1 neon laser, 4 agassiz, 4 albino, 2 adolfoi and 1 emerald) (I had larger groups of each but since my tank "malfunction" I've lost a few, I do plan on upping the groups to 5 agassiz, 4 adolfoi, 2 neon's and 2 emeralds) (My emeralds and lasers have always schooled together) I have a 40g breeder tank, minorly planted, a ton of hiding places, and I'm considering getting the following (in about a month or so) (Filtration = 525 GHP) 2 - 3 Pictus Catfish 4 - 5 upside down catfish I know that Pictus will eat anything that will fit in it's mouth, but I don't have any cory's smaller than 1.25" right now. My smallest is two albino's, one about 1.25" and another just a bit bigger. Everybody else is 1.75 - 2.75" and growing. Will upside down catfish and Pictus fight? Would the Pictus still try to eat my Cory's at there current size? Am I over stocking my tank? Lastly, is three air stone's (two pumps) sufficient for the bottom stock, or should I add more? Here would be the full stock 16 - 18 cory's 2 - 3 Pictus 4 - 5 upside down catfish.