Thanks in advance to all who respond. The TFP website and forum have been tremendously helpful for me.
I have a small problem.
I converted to the BBB method a few weeks ago. Prior to that I was using stabilized chlorine pucks with an inline chlorinator. My CYA levels were off the charts and the water was cloudy and acidic. It took a long time with partial drain and fills, but I finally got the CYA number down to a reasonable level. My pool is small - the pool store has it on record as 6400 gallons, but I calculated closer to 5000.
I bought a TF-100 and have been testing regularly. The CYA level is 70 (I have tested on several occasions to make sure I was reading the turbidity test correctly, and I always get around 70).
I treated my pool once with a couple cups of borax to raise the pH to the correct range, and it has been rock steady at about 7.4-7.5. I added about a pound of baking soda, and my TA has been very steady at 90-100.
I have tested my free chlorine with the DPD test every night. It has never been below 5.5. I add bleach either at night or early in the morning (usually takes between 2-4 cups depending on sunlight). CC is 0.5 (maybe not even that as the water barely turns pinkish when I add the second reagent).
Test results from tonight: pH 7.5, T.A. 90, FC 6, CC 0-0.5, CYA 70
Today I noticed a small growth of green algae on the steps in the shallow end and a few spots of green algae in the corners of the pool in the deep end. The water is also not as clear as when I first converted to BBB. I thought if I maintained FC levels of 5% of the CYA level that algae should not be a problem?
I added more bleach than usual tonight. I guess I need to shock it now? Anything else I should change or adjust?