Hello,
This is Frank from Frag farm, sorry to hear about your issues going on. Let’s see if we can tackle it in stages.
First, are you currently running a carbon to neutralize toxic warfare in a mixed reef tank?
Second, from reading your prior comment, it seems like you put a lot in the tank within a three and half month period. When it comes to reefing stability is key, and slow and steady wins the race. If this is an emergency, I recommend you send your water out for an ICP test, but if you want a quick solution I would run a poly filter in case there is toxic metal in there. It won’t hurt to run the filter.
Third, please check your ammonia, nitrite, and nitrates.
Good luck