I was reading back through this thread to make sure that I wasn't forgetting anything. Since I didn't have anything to medicate food I did do the prazi yesterday and I've done 2 50%water changes already on both tanks. There is some ammonia in with the yellow tang so I have been using prime, one dose yesterday and one today with a 50% booster after the water changes (I only had one cycled sponge filter so I put that in with the blue tang since she was in worse shape and there's no ammonia in her tank). Is the medicated food you referenced above the metro+focus? The biospira, metro, and focus should be here tomorrow