Unhealthy Foxface - Calcium too high?

[hawkey992]

Recently I have been dosing my 90g tank with calcium to improve the coralline algae encrustation. I think I've been adding too much because my foxface is very ill now, he can barely swim, his gut is distorted, and his color is faded. The calcium levels are under 300 mg/L which seems very high to me, though this is a new kit and I may have made some testing errors. Supposing the readings are in fact true, could this high calcium level be causing health problems for my foxface? (all other fish are fine)

 

[N0okie]

I have never heard of problems from too much calcium. I know that the Ca can have an effect on the Alk and the Mg in the tank though.

 

[Packersfan21]

I'm actually pretty sure that calcium is supposed to be at 450mg/L.