According to several pools stores in the Dallas / Fort Worth area, the legislature has restricted the sale of 12.5% Sodium Hypo to consumers. The pool store continues to sell my mother Trichloro or DiChloro in power form for shocking the pool since she has mustard algae. As of today her CYA = 94 so I called her local pool store to see if they sell Cal-Hypo or liquid (turns out I found liquid chlorine 11% at the local orange big box). While speaking to the owner of the pool store, I asked him what target levels of CYA do they recommend to their customers. His response was 50-90 due to the extreme heat and sun we have in Texas. I asked him at what point does CYA get so high that you recommend a partial drain and fill, his reply 120ppm.
I am not buying into this because I'm a faithful BBB practitioner although I do live in NY with very different weather than Texas. Anyone ever hear of pool stores recommending these CYA levels in states that have extreme heat, anyone run their southern pools this high? I'm telling mom she needs to be at 40-45 at the most, I run my pool at 30 ppm CYA.
Feedback is greatly appreciated! Thanks !