Been BBB since pool was new 2004. I always open to 0 CYA. Add 2 lbs or so to get to 30. Always read that CYA does not disappear but mine does. It must be possible because mine does. I only lower the level just below the skimmer.
Also this year more friends bought pools and have been inviting my kids over. I arrive and test their pool and explain about BBB. I give them the site and tell them to read and make their own conclusion. I told my wife there pools are not maintained and I don't want the kids in the pool. Then my kids over hear and say " my father says your pool is not clean and I cant go in"
How do I explain it to friends when they just don't get it. I am unemployed and just lost health insurance and do not need my kids sick.
Example: 1) friend asked me to test his water. His CYA is 120 and he does not keep his FC high enough. He got mad when I got some bleach and poured it in his pool. Hey my kid was swimming. his CL was only 2.
2) Another is using the frog minerals that the store talked him into. His cartridge filter clogged the first yr from it and they had since sold him a DE filter. From what I read about minerals on this site and the slow kill time or no kill of viruses I said absolutely not. You want to swim, swim in your own pool. heck you can probably drink the water in ours its so clean.
Summary: How does anyone else go about others with pools that are just plain scary. They look good but looks are deceiving.