Hi, I'm trying to establish the BBB method this year in our AG 16X32 vinyl liner, deep-end-about-15,000-gal pool. I had an algae mess that I've generally cleared up, at least to the naked eye. The water is sparkling but the pool sides still have a green/brown stain that I *think* is fading some.

Other threads I've started have encouraged me to keep it at shock 10 for about a week. I'm having trouble doing that for some reason.

My #'s fluctuate wildly. Last PM I had a 5 FC.

This AM I have a 7 FC after adding a gal of 5.25 bleach last evening. If one gal is supposed to raise the CL 5.25ppm why don't I have a 12 this AM? It didn't rain and there was no sun to dissipate it.

My other #s
CC - 0
TC - 7
pH - 7.1 (I'm having trouble stabilizing this too. Added 4# of 20 Mule 5 days
ago to raise from 6.8 to 7.2. Then went to 7.5 then down now.
Alk - 100
CAL - 130
Cya - 0

Summer'll be half over at this rate before I can ever let the kids in.

Advice please?

CoffeeBean