Well, after reading up on these guys and hearing all of the good things about them I got 5 over the weekend for my 125 gallon tank. They seem to be doing well - hiding about half of the time and hanging on the walls or driftwood the rest. They seem to have cleaned off one side of the tank (there was a small patch of algae at the top). My question is this: how many would be a good number in this size tank? I don't have much algae in general but there is the occasional patch on the glass or rocks. I am also supplementing their diet with Omega-1 veggie rounds and will start using some blanched veges this week. Thanks!