In The Swim Chlorine-Free Swimming Pool Shock 12 Lbs. Sanitizer in 1 Lb. Bags
24 feb 2018
Very satisfied
I started using this shock in my in-ground salt water liner pool last year. 2 bags of 1 lb for 20k gal. I shock about every 3-4 weeks and it works very. In fact I am buying more for this season.