I wouldn't take the chance on that! If I remember correctly, you picked these guys up at the LFS straight from the shipper before being unpackaged. Chances are, they have already not eaten for at least a day or more prior to you getting them. I would go to the closest LFS who deals in saltwater and pick up some various foods like mysis, Enriched Brine (Not to be used as a sole food source), APBBreed Othomine and TDO-EP1 (Reef Nutrition) pellets if they sell them, Ocean Nutrition Formula 1 or 2 pellets. Not saying to get all of these, more so a place to start. Though, I would suggest the mysis and Brine as these should entice them to start eating.So I added two perc clowns to my 29 biocube thurs, they seem happy and healthy and appear to be ok, but the won't even budge when I throw pellets in to feed them, will they eat if they are hungry enough? I'm going to the meet tom and I am going to get some better food for them, will they be ok for 4-5 days without any food?