untill he popped.
lol.
my ray will eat pretty much untill i stop feeding him, he bulges quite a bit in doing so, i dont feed him like that anymore, that was just when i was trying to get a feel for how much was good to feed him.
it will be different for pretty much all rays, i think you just have to try and see what you think is best.
they can put down some serious food.... in the following thread you will see that there is now discussion on how much and what type should be fed... always something new to learn...