Gshock;4732101; said:Just stop feeding everything else and only feed shrimp until all the rays in the tank will eat it. Eventually, all your rays will know thats the only thing they're going to get and just start vacumming peices up before they hit the bottom.
I agree that is answers all of the thread.
I have looked after peoples cats before and they say they are "picky"...after a few days of only offering one food they soon learn. Aquaman told me to only feed worms after pellets that way they only get the treat at the end.