I posted this in the newbie forum, but I thought I better put it here. In my tank i have a Bala Shark, a Red-Tail shark, an algae eater and a Knight Goby. I feed the fish flake food and all of them seem to eat it except the Red-tail shark. I found out that they like either Shrimp pellets or Algae pellets, so I purchased some Brine Shrimp pellets. I put some in there, but he did not seem to notice them. Should I be worried about him, or does he eat at other times I dont see him? Do they eat at night? Maybe that is why I dont see him eat.