Karen , I too am new to the bbb method. recently I had a small problem with not being able to hold cl levels. I added gallons of bleach to my pool everyday, and my pool looked better than i've ever seen it. But I continued to get patches of green algae around my walls across from my return jets . I knew I was fighting something so I kept adding the bleach to shock levels. Then it came to me, I have not cleaned my filter in almost two weeks while trying to fight this thing.So I turned off my pump and gave the filter a good cleaning . Needless to say I have not seen algae in my pool in two weeks. My wife can't believe how crystal clear the water is. I know this post is hidden but I want to thank you guys and gals who provide so much info for some of us new people.