I need help choosing an algae eater to put into my 29 gal. tank with an agressives red tail shark. I'm pretty sure he has killed some of my fish, including a few goldfish that were bigger than him. By the way, I know they should not have been with him. My husband, who is the fish expert in the house, doesn't follow the community rules that apply to fish aquariums. It worked for a while. We have had some very long lived fish. This red tail shark is approximately 10 yrs. old. The last Cory that died this week was about the same age. But any new fish that gets placed in the aquarium gets picked on terribly. Personally, I wish I could re-home the shark. I'm pretty sick of dealing with all the deaths, which I take personally. Anyway, I need some tough, voracious algae eating fish. My tank is dark and murky from algae. Plus, I think it's cruel to make this shark live in total isolation. Can someone recommend some algae eaters that can withstand the bully my shark has become? I only want 2-3 new fish, though.