Once my co2 reactor is running I will stay with this magnesium additive for the occasional top off.

http://www.homehardware.ca/en/rec/in...1?Ntt=Ice+Melt

I'm sure theres a Home Hardware in your area. Give this a look

Yes, we do have a Home Hardware in Langley. I notice from the ingredients that it is 83 - 87% MgCl. But what is the rest? I am a little leery of being the guinea pig on a product used in my reef tank. I noticed the same at Rona, Canadian Tire and Home Depot. They have some MgCl products, but none of them very pure.

Edit: Just noticed that the Home Hardware product is Calcium Chloride, not MgCL.

If you're doubting chemical purity just go order from BRS or I believe one of the sponsors has bulk chemicals as well (if you can't make it to the border). I use BRS stuff and it always mixes crystal clear.
Hell if you really need MG I can spare enough to mix 2 or 3 gallons of MG solution till you order.
I go through CA and ALK 4x faster than my mg so I always have extra when i order their bulk mix kits.


You already bought another doser, but you could have done the knot in the airline trick for a slow addition.

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.

Or a micro ball valve
These are great for drip acclimation too, amongst other stuff