lol for the record, I do NOT have any sun coral at the moment... I just really really want them
I had thought about the water balance ting too but cnidarians generally are osmoconformers... that is, they are osmotically balanced with the surrounding water via their outer skin; I had figured that if this was true, it wouldn't matter if I fed them a dry food since they would just shrink a little and suck up more water through their skin to compensate... but maybe you're right. Maybe a few pellets once in a while is okay, but not as a staple food.
anyone else want to throw into the pot?