P-R:
We are all trying to help. We all want you to have a safe, healthy and easy-to-maintain pool.

The reason I'm hammering steps is it sounds like you are inadvertently letting FC levels drop to ineffective and, as 'Geek says, you'll not get organics to stop growing that way. It's like a fire that you have to keep pouring water on or it flares up again.

One final ingredient is needed--P.O.P.P. Pool Owner Patience and Persistence.