Visited a local pool store. They install nice pools. They also sell Bioguard chemicals. I noticed they sold both MA and SA (Muriatic acid and Sulfuric Acid). I asked about their pricing and it was the same as HD. I was confused about the SA and they said it could be used like MA. Confused I asked why would you want to add sulfates to your water. Didn't get a reassuring answer.
We also talked about TC levels and CYA levels. I stated I normally run about 10% of my CYA level (80) so I keep my TC around 8. She said that was high. I stated I realize compared to no CYA it would be but then I used the comparison of having an army of 100 and only sending out 10 to fight at a time. She thought that was a silly analogy and started talking about CC levels.
I realized I had nothing to offer. I did get a couple of phone numbers, one for a screen room person and one for deck repair. We'll see how it goes.
I should have learned what I've learned here stays here till asked about.