I use frozen foods like cyclops,daphnia,mysis,brine, and baby brine.I use a sea squirt but you could use a turkey baster and I feed them when ever they are open during the day.I never feed them at night so they open during the day more often.My rock has over 100 polyps on it so feeding it every day is the best way to make sure I get em all.If your is smaller and easyer to feed and keep track of you should be feeding each polyp at least 2 times a week.They are sticky and will grab hold of the food easily.