I have the TF-100 for a month or so but prior to getting it had been shocking my pool when I let the FC drop to low and algae started to bloom.
After reading this forum I used the calc. to estimate the shock and was successful at getting rid of the algae bloom. I got my test kit and found out that I was about at mustard shock level so since I met the three conditions to stop the slam I did.
Using the TF-100 I got everything in line chemistry wise and kept the FC at the upper goal 80% and let it drop to close to the lower limit but never below it a few times.
Last few weeks I have noticed that the walls are getting regrowth of algae now even with the FC at the upper limit and even a few ppm above it in case my CYA reading was off.
Question: Can algae regrow that fast at the upper limit if you have some residual algae to "seed" it?
I was laxed in removing 100% of the algae since I figured it was all dead anyway at the sustained mustard shock level for so long.
Is the only cure to get it back up to SLAM level and remove light niches etc.? (BTW I think that my pool sweep and attached hoses are also culprits that I don't hear mentioned often)
Pool looks great and I just want to stop my pre TFP once a week shock treatments I used to do.
Thanks in advance!!