I was just thinking - why all the bad advice from pool stores anyway? Is it a conspiracy?
I mean, even if the whole world of pool owners decided to get educated on how to properly test and balance their pools, and what exactly is in the stuff they put in their pools, the pool stores still would not go out of business. I mean, then the people would still buy their liquid chlorine, their CYA, their test kits and reagents, chems to adjust their ph, etc., at the pool store. It's just more convenient, and people go where it's convenient.
However, if people knew exactly what's going on with their water, they would not spend hundreds on worthless chems, and then hundreds to try to clean up the mess that comes from not knowing what's going on with their water. So I guess that's the conspiracy. Have people keep their water messed up, so they have to keep coming back to fix it.