ARM medium coarse media

[apexifd]

I just got my Vertex calcium reactor setup and reading seems to be good... 3 days of steady reading on Ca and kH. consistent daytime and nighttime pH reading as well.

pH 8.13 day 7.75 night
kH 8
Ca 440-460.

but, I am wondering, does the media has enough magnesium in it??

if not, should I be starting to does magnesium?

Thanks