Had chlorine demand problem. Looking at test kit chart have little over 12,000 gal pool. Put 1 gal of bleach yesterday am and 2 gal at pm. Current ph is 6.8. Current chlorine is at least 5 or higher. Looking for a cheaper solution than making local chem company rich. (test srip from them as of today still showed no chlorine. Above ground pool, 2 hp sand filter that has run almost nonstop for past ten day. Water is crystal clear and stat as of last week. CYA as of 5/31 - 70, 6/3 - 100. What is my next step. God's answer to prayer finding this site!!!