Ram Chemical's calc. chloride substitute for Dowflake?

[AustinVines]

Randy et al.,

I have been unlucky in finding deicer here in central Texas (imagine that), but a pool supply store has "Ram Chemical" 77-80% pure calcium chloride which is the same purity as Dowflake. Is Calcium Chlroide with that purity level fungible between brands or could the 20-23% "impurities" be harmful to my tank?

Thanks. :)

[Randy Holmes-Farley]

No, the 77% simply implies that it is calcium chloride dihydrate (23% being water), and says little to nothing about the suitability or purity of the sample.

I extensively tested Dowflake to verify its suitability:


Purity of Calcium Chloride
http://www.advancedaquarist.com/issues/mar2004/chem.htm

[AustinVines]

Thanks, Randy.

[Randy Holmes-Farley]

:thumbsup:

Good luck. :)