EricTheRed
No, I'm not a communist..
get the all in one doser with 3 heads (bm, or chinese) . save the rkl/apex for your lights, pumps, reactors. i dose alk, cal, and vinegar. im pretty happy with it and i diy my 2 part. magnesium can be dosed manually, vinegar is more important.
Ditto..I have the same one. It is a Bubble Magnus knockoff. Search for "Marine Color" dosing pump.