Someone gave me four otos about a week ago and they seemed to do fine, my glass was nearly covered in brown algae in a 55 gallon angelfish growout tank. About a week later, almost no algae.I read they should be alright with algae wafers, maybe spiralina powder. I can't figure how they would find powder in this tank, and I don't know if they will be ok with just wafers. I've seen you can feed veggies..how is this done? I can't find info enough, so I ask for your help,..did read profile.