When I opened our pool in April I had asked how much bleach on average people were using for the season. I've kept track Since April and I've used 11 cases of liquid shock, 44 bottles of 12%. Used one bottle of muriatic acid. Fc levels maintained at 5 to 6 ppm. One container of stabilizer. That's about all I've put into the pool this year. Looking to close in the next two weeks or so. Have 2.5 bottles left of the 44 purchased to shock and close. Just wanted to share this info.