I have been reading about all of these things we deal with in managing our pools and the way to solve issues with the pools mainly using the BBB supplies, MA and CYA at times and the occasional sequestrant.
I also read about the pool professionals in the stores and driving around "treating" pools with PH+, PH-, pucks & powders, algaecides, "shock", and the other expensive compound chemicals they proffer. It seems they never consider the CYA in the pool's decision making process.
At my LPS, the first thing they ask is your "What does your water look like?" Then they test your CYA using the sliding dot tool. Then they do your chlorine and other tests. After the tests are done, they make recommendations based on your CYA and the related levels. I now understand this is not the way most pool stores operate.
How is that I read about pool professionals that don't solve algae blooms by using the proper level of chlorine based on the the CYA? Why does it sound like we should all fix our PH and phosphates, ignore the chlorine and CYA levels, add CYA-laden powders... and call me in the morning?