Dosing Mg

[Reef Pilot]

Thanks for the offer. At the moment, still researching the subject. I could buy from BRS (I live only 20 min from the border), although the loonie is down pretty low these days. But would like to buy locally if I can.

I just bought the extra doser from a canreefer, and wanted it also as a backup to my other two that I use now. So I could put it to use with Mg. But yes, the air line with a knot would probably work almost as well.