Refill Surprise

[Eric W.]

I had my Sundance Optima delivered and set up on June 25. About a week later, we had to drain and refill due to a burst blood vessel, and I thought that would have covered the initial change for a new hot tub. In my experience over these 4 months, we burn through a lot of chlorine. Our tub is 525 gallons, and a 1/2 cup of 12% liquid shock after soaking at midnight will leave us with 1ppm if we're lucky the next day at 1pm. I attributed the high CD to the ozonator. If I forget to check the water for a day or two, it's cloudy when I open it up.

I refilled it Monday, the 4 month mark. I had a new N2 cartridge (I don't count on this, I use it for backup) which I installed at this time. Adjusted the PH and an initial clorination of 3T of Dichlor (this is Chicago city water). 24 hours later I had 10ppm of chlorine, 48 hours later 6ppm. I put a 1/4 cup of liquid shock in after I soak daily, and the next night it's still at least 5ppm. Also, all of the foam is gone.

Needless to say, I'm thrilled at this turn of events. I was considering a switch to bromine for the winter because of the high CD and the need for a daily dose or two of chlorine or I get cloudiness. It's only been a week, but it appears the change of water has stabilized the CD.