I can now see the bottom in the shallow end. Water still has a slight green tint. Shock was calcium hypo. 34,000 gals. DE filter (Nautilus Plus SP), pump 2.20 hp. I tried to order the K-1515 kit but it said I am not authorized to go there. A web search found a K-1515A kit. Is that the same one? Is it something I might find locally in the Dallas area? Thanks for the help!