Quote Originally Posted by waterbear
check out this PDF a lot of info on calcium chloride
http://www.omri.org/calcium_chloride_final.pdf




HERE IS THE INFO OFF OF THE DOW WEBSITE FOR POOL AND SPA APPLICATIONS:
http://www.dow.com/calcium/app/poolspa.htm

THEY LIST 2 PRODUCTS FOR THIS USE....
DOWFLAKE AND THEIR ANHYDROUS CALCIUM CHLORIDE MINI-PELLETS!

GUESS DOWFLAKE IS THE WINNER IF YOU DON'T WANT TO BUY IT AT A POOL STORE. I WOULD BET THAT MOST OF THE CALCIUM HARDNESS INCREASER SOLD IN POOL STORES IS JUST REPACKAGED DOWFLAKE!