Pool Chlorine
WoW. 6 bucks a gallon ? Here in Florida I get Chlorine at the pool store for .89 per gal. one store even gives me a discount to .79 per gal. I use it on roofs at 6 1/2 to 1 and it turns mildew to a rust color in about 5 minutes. That figures out to about 1.85 %. (12%/6.5=1.846)...