Hello. Newly registered but have been lurking for a while. First season with new house/ pool. Approx 40k at my best estimate. Vinyl. Long story short, I had a lot of leaves build up this fall due to me being a novice and my aquabot breaking. ( just bought a dolphin premier by the way and love it). Anyway. I had a lot of stains and I assumed it was organic from the leaves. Leslie's sold me a bunch of **** bla bla bla and that didnt work. After extensive reading mostly on here, I relized that vitamin c cleared the stains. So I did the entire ascorbic acid treatment, bought the tf100 and am rapidly on my way to understanding how this actually works. Problem was my cya is very high. As far as I can tell probably 100-140. Pool store tested and said it was 60 but I've done it 5 times and test over 100, this includes diluting method. Obviously the cya came from previously using pucks in a feeder, and all the quadruple shocks Leslie's told me to do. Anyway, I drained 50% of the water last night and am in the process of filling it back up now to use the BBB method.
My question is; can I just start the process with simple balancing to my levels using the pool calculator or do I need any special methods ie shock to treat 50% new water?