I have a 30,000 gallon concrete pool.
Cya = 100
FC = 8
Alkalinity = 80
Ph = 7.4

I am changing over from using trichlor pucks to just using 6% liquid bleach. I am in Hawaii so it is in the 80's almost every day and the pool water is warm. Should I add the bleach every evening, every second day, or what do most of you do during the summer months? I started out using about 1 gallon of bleach every second day, but I am having a bit of yellow algae on the walls even though I am keeping chlorine level at 8. Also, my test kit only tests chlorine up to 3, so I am filling the tester half with regular water and doubling the results, but that only gives me a measurement up to 6 and if it is a little darker yellow I am guessing it is around 8. How can I get a more accurate measurement?

Thanks... Vivian