I am getting 2 or 3 albino corys for my tank(look at sig. to see size and fish). I hace medium gravel. It is not sharp, but neither is it round. I am hoping they will be ok. It is the "normal" sized rocks that I see in most aquariums. Also do I have to feed them algae wafers? If so how often? Do they come to the surface to eat flake food? I need as much info as I can so I can take care of my corys. Thanks. :huh: