I have owned a pool for 10 years. During this time I have blindly allowed the pool store to test the water and sell me product. The new "problem" with my pool is phosphate levels "off the chart" (>2500). Long story short, after three rounds of treatment my level is still greater than the scale. This has caused me to grow in frustration which lead me to this site and the realization that I have been allowing myself to be manipulated by the store for their own gain. I am now in the process of cutting the pool store umbilical cord. In the coming weeks I am planing on removing the chlorine tab feeder from my system and adding a SWG. The pool store stated that I will have huge problem because the SWG will not produce stable chlorine and with my phosphate levels being so high the results will be a poorly maintained pool. Assuming my CYA is maintained at the appropriate level it seems to me that his advice is flawed. Being a total newbie I seeking affirmation that my assumptions are correct.