I need some help, facing a major headache with our 35,000 gallon pool. I have dropped roughly 50 lbs of Chlor Brite,15 jugs of liquid chlorine, drained/ refilled roughly 4000 gallons of water and cleaned the cartridge in the last 8 days. However the pool is not able to hold onto any chlorine even after all the shocks/ liquid chlorine. Please see the test results below, I also tested with my Taylor Test kit and the color is within the 0.5 - 1 range. Please kindly provide some suggestions or guidance. Thank you.