I have been buying jugs of 12.5% chlorine from a pool store. I have an AGP that holds 13,500 gal.
2.5 gallons should bring chlorine level up to about 24ppm. I am consistently getting around 13ppm. 2.5 gal of 6% Clorox does that. Is there any way to test the strength of the chlorine straight from the jug? I called the pool store and they insist it's 12.5%. Said they have had no other complaints.