My betta Dorado is now a cory catfish. He shoals with them, digs through the gravel with them and generally hovers with them. Why? Because he has realized that the cories get MORE FOOD than he does. I was feeding the cories after lights out but Dory has caught on, and he too is nocturnal now. How do I know? Because last night, I had to turn the light on in the middle of the night and there was Dory, wolfing down the last of the cories' wafer. Which explains why he looked like he swallowed a marble in the morning and is now being fasted (you should see the faces he makes: "But I'm...sooo weak...with...hunger *puppy eyes* Pleeeeeaaase?)
So anyway, my question is, has anyone ever tried taping a plastic box (2.4L) with little holes in the lid to the side of their tank and putting their betta in it for about an hour? This is probably going to be my next move, but I want to check that there won't be any ammonia poisoning or anything like that. So, anybody done this or have an alternate idea?