Salt
 

I have used Salinity, and now more recently IO (not reef crystals) for over a year. I have to clean out my mixing container every 6 months or so to get rid of all the black scum caused by the binding / anti-coagulants in the salt. That got me thinking, if I really wanted to switch to a pure salt, is there anywhere in Calgary you can get HW Marine mix? I have never seen it locally.....