Sps dying

[Larsnauta]

Okay we are a while further and it has not gone so well .. Corals look very bad and some are completely dead. I lowered the KH to 8.0. about 80% of my stone consists of caribsea reef bones (fake stone) so is it possible that I have too little real living stone in my tank?

 

[Larsnauta]

This is what it’s looks like when I cut the reef bone in half. It’s Grey looks like cement to my?

 

[Larsnauta]

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