Mass Coral Death

[ScubaGirl]

Yes, I have Chaloupa. I officially worship the lady, LOL. She has helped me through so much ****. I have had everything go wrong with this tank and she has helped me pick up the pieces. This one is baffling her too. She's leaning toward the kalk treatments that I did for the aptasia. I stopped them 3 water changes ago (about 5 weeks) though so I'd be surprised if it's still having an effect now. Feeling like I have to blame it on something. I have limited corals so it's not likely that something has fallen down in behind. Plus, I have my rock away from the back wall so I can see down and through with no real problem.

It could be that my live rock needs to get switched out a bit. I haven't added anything in 3.5 years. I'm too scared to with all the other problems I've had. I have very little coralline algae.