I am currently worried about my Reef tank, as my corals have been opening and closing, its gotten better ever since i completely scraped my reef tank for hair algae, but I'm really worried about my corals. I am using Salifert All-in-one, Kent Iodine, and Kent Iron and Manganese (for my refugium). My frogspawn looks healthy(ish) in the mornings, but tends to close up towards mid day. Any help would be appreciated.

