After placing it in the tank, I would leave it alone for about a week. That will give it a chance to "settle-in" and find a spot it likes. Although feeding is not actually necessary, it will accept and appreciate being fed small pieces of meaty foods such as silversides, shrimp, mysis, etc. I feed mine about once every 3 days or so with a long wooden stick (like you would use for a shish-ka-bob). I lightly touch the fish to the nems tentacles. They are sticky and will grab the food off the stick. Be gentle and cautious not to jab the nem. Never try to force feed. If it doesn't want it, doesn't like it, or is not hungry, it will let the fish go. You should then get the food out of the tank (Unless a tank mate eats it).