First off, thank you so much to TFP for your Pool School and your PoolMath calculator and advice. I would have never known how much chlorine to add based on my CYA. I was having a whole host of problems and kicking my FC up to the levels suggested based on my CYA has got my pool looking amazing!
I read about phosphates in the Pool School. The local pool stealership tells me my phosphates are over 2000. I have a sweet gum tree that keeps dropping stuff into the pool, so I'm sure that is where those are coming from. I had a bit of algae, but now that I have my FC where it's supposed to be, no issue there. The kid at the pool stealership had no clue about the FC/CYA relationship and told me I needed FC at 2-3, when the chart says minimum of 5 for my CYA level. As a result, I question their knowledge and credibility.
What is the real story on phosphates and what should I do?