Another 2 part Ca question

[Kenfuzed]

Need advice from anyone familiar with mixing their own 2 or 3 part calcium additives. I mixed up some calcium to make a 2 part calcium additive however I'm concerned with the results of part A. I purchased some Anhydrous Calcium which stated an ingredient of 95-97% anhydrous calcium and 3-5% moisture. When I mixed 2-1/2 cups of calcium with RO/DI water to make up one gallon, it took on a light brown color. Is this normal?

Out of concern I ran the mixture several times through some carbon but it only slightly reduced this dirty coloration. I've yet to dose this since it didn't look quite right.

 

[Randy Holmes-Farley]

What brand? Some, like Prestone Driveway Heat, sometimes seem to leave a darkish red residue.

 

[Kenfuzed]

It is named "Leslie's Hardness Plus" and is labeled as a Calcium Hardness Increaser for spas. I have read of many others using pool/spa calcium and I don't see anything listed for ingredients other than:
Calcium Chloride, Anhydrous - 97%
Moisture - 3%

When mixed it does have a redish dirty look once dissolved.

 

[Randy Holmes-Farley]

It may be fine, but without a Pedigree tracing back to Dow, I can't be sure.