I went to remove my winter cover yesterday. Water is a bit cloudy, I tried to shock the pool, but the FC is rising very slowly. The water temperature is 50, after adding about 5 gallons of chlorine(sodium hypochlorite 10.8 %), the FC is only about 0.5, the pool is about 8500 gallons, I have not started the pump or heater. Should I keep adding more chlorine or should I wait till I bring up the water temperature and shock again?