Built our new home with 11K gallon plaster SWG Pool and Spa 2013 in Cape Coral, Florida. We did not move here until 2 months ago and had a moderate amount of brown calcium scale in spa and pool. Discovered that the landscaper had installed irrigation water sprinklers in the back garden which sprayed high phosphates from the community reclaimed irrigation water into the pool for the past year. I capped the sprayers and stopped that problem. Next we found that every time we used the spa we became ill with crusty eyes, congestion, headaches - SWG was wired to spa so every time we heated it we were being bathed in very high toxic levels of chlorine. That problem has been corrected and we can turn off the SWG before we heat the spa so Chlorine levels are now 2 - 3. Pool guy never kept pH low (which I can see would be impossible with only weekly visits) Chlorine was always over 5, pH impossible to maintain below 8.2 even with TA 80, CH 400 ppm, Stabilizer 60, TDS 4200, Salt 3000. In past 2 months I have added a quart of Jack's Magic Magenta(about 2 months ago), last week added 64 oz Scaletec Plus. Sequestrate Level 12. Have also added Salinity Phosphate remover periodically with phosphates 2500 initially. Washed filter every few days with lots of milky calcium water being released. Brushing all surfaces twice a day for 2 months as advised by pool builder. Scale is 90% gone but still difficult to maintain pH below 7.4 and he advised keeping it less than 7 to remove the scale. Have been trying to maintain pH about 7.2 and check twice a day in order to remove scale. I would like to add borates to help stabilize the pH rate of rise. Should I wait until scale is completely gone? Or will adding now actually help me to keep the pH down and aid in removal/reacurrance of remaining scale.