Approaching total coral wipe-out

[i have crabs]

On the plus side of killing my corals, they all fit into one of the 2 sides now and i can have non coral safe fish in the other side haha, about 2 weeks before i started having problems i overdid a dose of kalk but things seemd ik a couple days after so maybe not related, it also looks like possibly brown jelly disease in some of my corals but who knows, at this point im just letting it do what it wants and ill keep what lives the rest probably arnt getting replaced