I have a 75 gallon tank and would like to move in a Red Tailed Black shark that was my brother's (he is going away to college!) Problem is, I already have 3 Panda cory's in there. Will the RTB eat/harrass them? I have heard mixed advice on this one.. some people say the RTB won't tolerate any other bottom dwellers, others say their RTB is best friends with their loaches or cory's. What do you think?