Help calcium overdose

[jocks11]

I’ve just misread the instructions on a new calcium additive and vastly overdosed my reef, only realised when all corals have withdrawn, I had a bit of water ready to replace but my corals aren’t happy, waiting for more ro. To be ready but will take hours. Will this overdose kill my reef? Please help

 

[bluemon]

What calcium additive?

And what is the alk before and after?

 

[Randy Holmes-Farley Verified Community Expert]

How much of what added to what size tank?

Unless you added more than 200 ppm, there’s no emergency or need to do anything special.

 

[Reef Jedi]

When in doubt water change it out. How quickly did you raise it and what were the levels before and after?