Thanks for responding. My PH was very high after adding the borax, but the water was still green so I checked it again and my PH was very high so I added the PH decreaser according to the Pool Calculator. I don't know what I'm doing most of the time. I am using a test kit from the grocery store and Taylor CYA test which has been working fine for a month until we had this rain event. I have a Taylor Test Kit on order. I have added bleach according to your Best Guess Chart and my FC level is at 9-10. How long do I need to keep it at that level? Do I run the filter constantly? Do I brush the pool at regular intervals?