I have 2 otos in my tank, and when I try to put algae wafers in there for them, the other fish gobble them up before the ottos even get a chance to see them. Is there anything I can do to prevent this? Or something else I can feed them that the other fish won't eat? I have had them for about 2 years and they seem to be doing fine without the wafers, just eating whatever algae they find on the tank and decorations, but I wanted to start giving them something more to eat. Thanks.