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We were unpleasantly surprised last nite, when we hopped in our tub and found that some strange build-up had occurred in our HS Grandee! It's as if someone spraypainted sand into the tub since we used it, 2 weeks ago! We hadn't done anything different in the last two weeks, so not sure what it is or what caused it. Is this considered scaling, due to problems with the calcium in the water? If so, is our tub surface permanently damaged, or able to be scrubbed clean? Does anyone know how to get this stuff without damaging the tub surface? More importantly, how can we prevent its return? Thx for any thoughts on this one!
I don't know if the OP is still around, but I have seen this happen with both Chlorine and Bromine. In fact, I have seen it happen on my showroom floor with tap water: We moved into a new store, and the last thing we did late one night was fill and fire up a tub. We came in the next morning and it was calcified. We tested the water immediately and found that the tap water in our new location was (from a private well a block away) off the scale on the high end of both TA and pH. Quickly grabbing a bottle of "Spa Down," I had to put some twelve ounces or so in, fed in at three ounces every couple of hours until it came into range, and then more over the following days to get rid of the scale on the walls of the tub. I would have to feed in similar amounts of Spa Down anytime we filled a spa on the showroom floor - we would start with about four ounces as the cold water went in, and then another couple as soon as we could run the jets, and then we would test and balance from there as the heat came up.In the years since that, the city has connected all the homes and businesses in the area to regular 'city water,' and has closed down that particular well. And I have replaced the water heater, come to think of it... I would love to know how the local residents lived with that water! My Daughter in Law was the manager of the water district, I'll have to ask her!