Opened the pool two weeks ago no fuss and all looked good. Pool was built Sept 2010 and have been fighting constant pH creep. Previous two openings pH was high but no scaling issues. This year pH was off the charts high (was 7.4 when i closed). Took 2 gallons muratic acid and 5lbs dry acid to get ph down and stable in first few days. The good news is that TA is down to 60 and pH creep has subsided. After two seasons of constantly adding MA i was ecstatic. However, then I noticed the plaster has gotten very rough like sand paper below the winter drain water line. I am assuming it is calcium scale. Also finding piles of sandy substance in Polaris bag, assuming that is calcium scale too. Current test results as follows:
Looking for recommendations. I don't relish the thought of drain and acid wash.