My pool has been "out of action" for the past two months, due to a skimmer leak & plugged MD. The skimmer suction line was completely re-plumbed last Friday, and I will have the pump-house plumbing straightened out in two more days. The water is clear but devoid of chlorine, & the bottom has a thin layer of dust that has settled in while the pump has been inoperative. The TA is rather low ( 70 ppm ), but the total dissolved solids are 3 times the value of my already "hard" tap water ( 1242 vs 403 ).
Because the TA is low, I'm assuming the high TDS is due mainly from carbonates ( primarily CaCo3 ). I receive an annual water quality report from my water Co. ( San Gabriel Valley ), and the values seldom vary much year-to-year, as the source is well-water. The ions, other than Ca & Co3 are typically in the 40's for each ( Na, SO4, Mg, Cl & K ). I suspect that the high TDS is due to the fact that the pool has never been completely drained since I acquired it in 1971.
After the re-plumb is complete, I intend to run the Polaris long enough to remove the silt, back-flush the filter & pull the grids out for a manual cleaning, then address the water balance problem. Do you water experts believe I should do a total drain, & start from scratch to fill & balance, or do a partial drain & proceed to fill & balance. I am not keen on the notion of baby-sitting the pool, testing daily while it fills. My 60-year-old house is also begging for attention, and I am "running out of years" to get everything done ( help! )