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Saltwater Section Specialist
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Good thread hopefully a stickie.

And followup to the original:

An Improved Do-it-Yourself Two-Part Calcium and Alkalinity Supplement System by Randy Holmes-Farley -

Sources for materials:

calcium choride: Ice melter for sidewalk/roads. Also hardener for concrete. Try redimix concrete places. Ask for calcium chloride not the brand name.

Cal-chlor is the anhydrous version 94-96% calcium chloride. Dow flake, tetra flake and most others are dihydrous (2 waters) and are 78%-81% calcium chloride.

Magnesium chloride (rarely) ice melter. landscaping (usually not dry).

I get both from a local industrial supplier in 50 pound bags. Costs are $40 or so total for both bags.

Also the cal-chlor is available in 25 pound bags for about $8 from a local redimix. They looked at me kinda funny and asked what I wanted them for. Then they just gave me a bag no charge.

Epsom salts, baking soda, and Mtrs. Wages pickling lime (Kalk) from the local grocery/drug store.
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