Keep up KH and CA

[Reef-Geek]

100ml per part should be considered normal, if you use the calculator thats only like 5ppm for your system. No way it can drop to 350ppm unless you starting point is low.

[daplatapus]

I had the same problem for a while. The only thing that fixed my issues was getting Mg up to 1450. I know some people will roll their eyes at that, but honestly, once I got it up there, my calcium reactor didn't get touched for months at a time and everything stayed rock solid