Anybody ever had bad calcium reactor media?

[The Opinionated Reefer]

Anybody ever had bad calcium reactor media? What I mean by bad is not that it's hard to melt but that something in it is causing a decline in coral health? I initially used ARM extra course but it was taking a PH of 6 inside the reactor to melt it but otherwise, it was good. I have now switched to coral bones as the media and it takes a PH of 6.4 to melt it to get the same effluent DHK. But ever since I started using it certain corals have seemed to decline.

 

[vetteguy53081]

Slow down the melting and see if it helps
What is your alk reading?
8-9 a good range