In my tank I have my Vieja Synspilia (about 8 inches) and I added three Rainbows as dithers. I had a blue channel cat also. Yesterday I added a Raphael Cat (more appropriate for the smaller tank and moving the other to my 150) and another Rainbow. Today new Rainbow gone, Raphael gone, and channel cat gone. Wouldn't those catfish hurt going down? Talk about expensive feeder fish! Those fish were at least two and a half inches, it didn't seem like there was anyway he could fit them in his mouth. Guess I need bigger fish.