I recentley got one twig catfish and added one "Omega One" veggie round to the tank, he doenst seem to be interested in it what so ever and is just on his merry way sucking the walls of the tank. It's not sitting at the bottom uneaten. I also clipped a tiny piece of cucumber to the tank and he isnt munching on that either. Is there something Im doing wrong or is there something I might be missing in terms of their feeding habits? Thanks for any help/suggestions 