This past week I have started losing my chlorine it is 0. I have been putting in 10 gallons every 2 days in the evening and the next day it's gone by evening. Had been doing good for a month. The water is clear. Inground 20X40 vinyl around 50000 gallons.

TC 0
FC 0
Ph 7.6
Alka 120
CYA 40