I have been a user of the BBB methods for approx. 5 years now with the occasional wandering off the trail. It seems I have made a critical mistake of having some water tests performed at my local pool store and more to the fact, I took them at face value. Bad mistake! I have a PS 233 test kit and just recently restocked it here on TFP. My problem was that I was having a lite bloom of algae which I kept treating and brushing but it kept coming back. I have put about 33 gal. of bleach in the pool over the last 2 weeks and I could not maintain any FC for more than a day. The store tests indicated I had 50 ppm CYA and 0 CC but I could not maintain the FC level. I have shocked 3 times with the FC coming back to 0-1 ppm each time. Last nite I tested my CYA level myself and showed zero on 2 separate tests. I added 2.8 gal. of bleach last nite and put 7 trichlor tablets in my dispenser , and circulated all nite. pH was 7.7 last nite and FC= 1 ppm, TA=100 ppm CH=250 ppm.
This morning, my reads are pH= 7.3, FC=5.5 ppm,CC=.5 ppm TA=70 ppm, and CH= 250 ppm, CYA still reads 0 ppm.
I am planning on adding 2 gal. liquid stabilizer, aerate, and continue to inject w/ the trichlor tablets and bleach until this evening. I may add 2 # of Borax and not aerate anymore until I see where my pH settles. I don't understand how all of my CYA disappeared, but that seems to be why I am eating so much bleach now. The pool is clear and sparkling with no signs of algae at the moment. Pool temp is 81 deg. F. Is this a good approach and what else should I do to get the pool back in balance? Thanks for your help in advance.