All for reef low magnesium

[dtv0893]

I'm currently dosing All for reef for my nano 20g tank, Alk and Ca within range but Mag is a bit low ~1200ppm.
Simple solution is just add Mag separately but all Tropic Marin mag, ca and Alk products are not available in my country. Oversea oder will take long and expensive. Is it okay to dose Mag from other brand?, like Aquaforest, redsea or seachem?

 

[minus9]

Yes, pick any quality mag solution and dose. Brightwell’s magnesion is simple to mix up and use.