With regards to the green poo, I read that it's a possible indication of a bacterial infection. Whenever feeding fish parts, I never had green/yellow poo in the tank. I had this happen to my pbass, and he went from being a ravenous eater, to not eating and pooing green/yellow. I didn't get a chance to fully treat him with kanaplex because he spooked bolted in the quarantine tank a few times until dead.