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    Stubborn Persistently High PH

    I have a 2014 Sundance 880 Optima, ~400 gallons. It was not used in 2022, but was powered on and kept at temp. Last weekend I drained, cleaned and refilled it. When drained, there was a slight bit of plant debris in the bottom that had blown in through the side of the hinge in the cover, but...
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    Sundance Spa TA Issue

    I need some help from the experts, please. I have a 2014 Sundance Optima 880 Spa (portable, 400 gals). It is kept outside and covered when not in use, temp. usually set at 100. i have a persistent problem with maintaining TA. I emptied, cleaned and refilled the spa for the Spring last week...