Cal tested at 350 ppm, mag at 1260 ppm. Both lower than I like, but not dangerously so. Everything is still very unhappy, I guess I'll have to go get more water this weekend for some more water changes. The only other thing I can think about is that I cleaned my powerheads a couple of weeks ago, I did use vinegar for that. However, I rinsed them until I couldn't smell any more vinegar & that was also, as I said, a few weeks ago.
corals tend to show decay weeks after a stressful event not immediately, could be vinegar I’d suggest changing out carbon. For more help I’d suggest listing all yr parameters you can test / a shot of the affected Corals / fts