alright, he's just not intrested in food right now and I can tell it's hurting him because he just hovers and swims slowly around instead of spazing like he used to.
you really don't have much of a choice but to wait. they starve after about 3 weeks, so go ahead and give him time. try a variety of foods like emerald entree, marine cuisine, etc. good luck
probably poop. watch it for a while and it should just drop off. may take a day. my clowns will let it hang out for a while, almost like a frat contest during pledge week