Hi there. I thought things were going good but last week I had slightly green water. I shocked pool with 2 lbs cal hypo. That was friday. I went in today with these numbers and they are calling for 12 lbs sodium bicarbonate and 2 cups an hour later of muriatic acid. I don't feel like that much muriatic is necessary. I sure could use some advice! 12500 gallon vinyl lined.