Hey there. No worries about your first post being one looking for help. That's one of the best reasons to come to MAAST. That favia (closed brain) takes some persistence and zero flow to convince it to eat. I don't have experience with fungia (plate coral) but they require a mature tank. Judging pics and your filter I would guess water chemistry is the culprit. Are you using RODI water? Focus more on target feeding and limit your broadcast feeding. Monitor the coral for feeding reactions and you will be able to digure out which foods your coral prefer. It may be a mixture of several different types: mysis, baby brine, rotis, etc.