Calcium Reactor media and Magnesium level

[zzl630]

Calcium reactor media like reborn is from coral skeleton. If I dial it right to have reactor supply right amount of calcium and alkalinity. Does the reborn media provide enough magnesium or any magnesium for coral?

 

[blacktippr]

You can add Remag to your calcium reactor. It Will not increase magnesium , it will maintain the mag.

 

[Randy Holmes-Farley Verified Community Expert]

Different corals and other consumers of calcium and alkalinity use different amounts of magnesium relative to calcium and alkalinity.

Coralline algae is at the high end, for example, so if a lot of the demand is from coralline, normal coral skeletons may not be enough.

So the answer is that it supplies some, but maybe not enough (or less likely, too much).

I'd assume it is supplying an adequate amount and only worry about it if magnesium actually drops too much since many salt mixes start with more than enough.