[driftdiver]

The pool shock at the local wally world doesn’t contain any calcium hypochlorite. Read the ingredients.

[woodbutcher1963]

Go to a pool store in your area. I would suggest a BIOGUARD dealer. Bioguard tends to make the best quality pool chemicals. Buy their product called Burn Out 3 or Burn Out 35. It is about 98% Calcium Hypochloride. See link below.

http://www.bioguard.com/mp/v/index.jsp?vgnextoid=38d7747c6a124110VgnVCM10000053d7010aRCRD&vgnextchannel=38d7747c6a124110VgnVCM10000053d7010aRCRD&vgnextfmt=default

[ChocChipCookie]

Inyopool.com carries Cal-Shock 65, which is my preferred brand. Their website says, “Pool Solutions Cal Shock 65 is 100% Calcium Hypochlorite with 65% available chlorine.”

I worry about people using pool shock that contains other, harmful ingredients.