Hi All. I love this site as it gave me all the info I needed (or so I thought) to confidently open the pool at my new house this spring. I have never owned a pool but felt confident using the K-2006 test kit. Needless to say everything was going great. I measured and adjusted the Alkylinity, pH, and hardness to be in spec. Then I measured the CYA which came back off the charts. I will be retesting using the dilution method this evening but solely looking at the scale I suspect my CYA is in excess of 200 ppm.
After spending a few hours reading through the TFP forums I have learned I need to drain 75% of my pool and refill to lower the CYA level to achieve the target level. The issue I have is that I live on a lake and have a high water table. I cannot dig more then 3 feet down without hitting the water table. I do not want to drain the pool and risk damaging the liner.
I have also considered renting a water/waste pump and pumping lake water into the pool while draining the pool by way of the waste setting on the pool pump (keep in mind I have well water). This would keep the level fairly constant while cycling out the high CYA water. This method would also allow me to start from the beginning, Any thoughts?
Or Should I just try and dose the pool with Chlorine and see if I can raise the free Cl level to Ben's best guess chart level? Then remove water and replenish at a slow rate (well/rain water)
Any comments will be greatly appreciated.