Calcium chloride source

[celesteculora]

Trying to find a good calcium carbonate source. Is Prestone driveway heat ok to use?

 

[PoolStored]

Here is what it in your Prestone. CaCl and NaCl are fine. Not sure about the SrCL2 or the Ca(OH)2.

I'd be more concerned that you don't know the % of each.

CaCL is the one chemical that I buy from the pool store for the purity. They sell dowflake here, good stuff, maybe $5 more at the pool store than big box.

My 2Cents...