Just it a cherub angel on Sunday. He ate that night, yesterday he didn't. Today I noticed some white spots on his side/fins. What do I do? Tank info: 29 biocube 2 occelaris clowns 1 bangaii cardinal 1 cherub angel Ammonia: 0 Nitrite: 0 Nitrate: <5 He hides in the rock a lot so feeding is really hard. Please help.