Anyone maybe know why I can’t keep a single hard coral without it being suffocated and dying? Everytime I get a f’ing hard coral, this brown crud starts from the tips and kills it’s way down the entire thing. It’s not slimy. I can’t brush it out of existence. Tank parameters are stable. I feed daily and I don’t believe I over feed for my stock. 9 hour light cycle right now. 40% intensity on 2 xr15’s. The coloring on the coral when i pulled out was brown and other parts slightly green. Diatoms really killing my coral? It’s not slimy so I don’t believe it’s Dinos. I’m at a loss. If it’s not a softie, it doesn’t live and even so, some of my softies get irritated by it and don’t open up as much.