Hi all! Just curious about chlorine usage. Im still new and been doing chemicals since January. When I started I had to add almost no chlorine and I expected it to increase with Texas sun. I'm currently aiming at 4.0 ppm and I added 1 gallon 3 days ago and today I tested .5 ppm. Water temp is about 77 degrees, outside temps have been hitting upper 80's with plenty of sun. Pool isn't exposed to a lot of sun, but some late am and early afternoon about 5-6 hours. Normal? Pool is approx 25k gallons.