Mass Coral Death

[ScubaGirl]

Going to test the tap water now before I do another change tonight. I have to be sure. I just have my typical tank test kits though, nothing else.

Someone also mentioned that I forgot to post SG and it has always been in the 1.024-1.026 range when some evaporation happens. Currently at 1.025 though.
Plus, I do calibrate my refractometer whenever I change the carbon, so every 2nd water change on average.