As per my tf100 test kit:
I typically vacuum pool and backwash filter every Saturday but by Wednesday there is green algea starting to form on the bottom of the pool. This started about a month ago. I typically just scrub it and it dissolves in the water. We have had a lot of rain and the pool has not been used much because of cooler temperatures. I have been using tablets for chlorine and using the shock you buy at Wal-Mart once a week. I am switching to the BBB method now. Is the algea normal? If not what should I do?