Just tested the SW mix - 480 ppm Ca - so same as the tank.
I am making a new batch of SW now... will do another water change this evening I guess.
I agree that with the dying coral, I shouldn't be seeing a huge drop in KH, so maybe the last batch of salt mix was just low on KH? This new batch I am making will be the first complete batch with the new salt mix. I will test the KH again when it is done mixing. If it is even higher than 11, maybe that has been my issue?
I am making a new batch of SW now... will do another water change this evening I guess.
I agree that with the dying coral, I shouldn't be seeing a huge drop in KH, so maybe the last batch of salt mix was just low on KH? This new batch I am making will be the first complete batch with the new salt mix. I will test the KH again when it is done mixing. If it is even higher than 11, maybe that has been my issue?