Wait till the lights go out for about 30-60 min (thats when they open up) and feed them with a baster. Mysis or brine (something like that) carefull not to hard cause they don't hold on to it very well. They do not need to be feed I haven't feed mine for about a year and they do just fine, but they grow faster. It also depends on the kind you have. If at night you don't see tenticles then that kind maybe more dependent on light then meat. Fraging these is very easy and I have traded them in for other corals of higher price.