Need advice on 2 part dosing

[Frogger]

I have used the BRS bulk product, the reefsupplies.ca bulk product and the J&L bulk product. I would say the Canadian products are about the same price the as each other however the BRS with the low Canadian dollar is probably about 1.5 to 2 times more expensive if you have it shipped to directly Canada, a little cheaper if you go through a mail box in Washington State (not currently an option). Washington State now charges sales tax on all items sent there making it less of a deal. I think it is about 8% on top of your order.

I would say the BRS product comes in better bags and mixes purer than the Canadian products.

Given the choice I would use the BRS product in a heart beat, but then again I am a pure water freak and have never in 30 years added tap water to my tank (5 stage RO plus 2 stage DI only for me). I ended up buying a load of the Reefsupply.ca bulk (supposed to be best quality available) during a big sale about 9 months ago. I will purchase the J&L product in a pinch.

Amazon.com now ships many products to Canada quickly. You can buy bulk additives from them a lot cheaper than anywhere else. I would not under any circumstance use products that are not at least Food grade minimum. I usually look for only 99% pure or better.

I bought a couple pounds of NaSO4 (99%pure) off amazon.com about 6 months ago. NaSO4 is used to create a more ionically balanced true 2 part mixture than using MgCl and MgSO4 mixture. Refer to Randy Holmes Farley's true 2 part mixture for recipe. NaSO4 is not readily available in Canada.