thanks, I think it should be fine, just rinse them first prior feeding. Mine ate earthworms right away since the first day. You could try starving them for two days, but I guess there is no point of doing so since you could feed them with prawns or something else.nice dots, are they eating earth worm? i have plenty earth worm in my garden, how to clean it? thanks. I had tried before, the rays dont eat it. Thanks