Hey guys so this is actually my friend's tank. He has a 13.5g fluval tank that's been running for about 8 months. He's had this goniopora for 7mos(first coral in his tank) and yesterday it started to show signs of bleaching?? He's using a Saxby setting on AI prime 16 and feeds the tank every other day. I checked all his parameters and everything looks fine and no signs of stress in his other corals. Any ideas? I know we've all heard gonis are hard to keep but he does try to feed it goniopower at least once a week. Please lmk what you guys think and if there's anything he can do. Would fragging it help?