OK i agree with the food, but i disagree with the flow. One must be weary regarding the flow with bubble coral. they have a fairly sharp skeleton that can damage their flesh. Also, use small bits of food for your recovering bubble, as you want to make sure it is able to digest it...undigested food can wreak havoc on the coral. use mysis, and use TINY bits of it. That seemed to work best when i was nursing mine.
I noticed that on mine, one mouth was gone toofar and the bubble seemed to sacrifice that mouth. Everythime i tried feeding it, it shifted the food to the good mouth. It now seems to be growing the opposite way. Make sure you Calcium is adequate (450) watch the flow (not too much) feed 1-2X/week (initially) and give it decent light. it will do well, eventually.