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    A little confused by the behaviour of the FC/CC test

    By guess and by golly I managed to pin the CYA to a reasonable level - 45ppm - though I don't know how it's going to hold up, as some new leaks (grrr...) have appeared that are going to require a little periodic topping-up, as I don't want to deal with them before spring. But that's not the...
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    Is CYA always this weird?

    I'm still working on getting the numbers in place after a purge+refill. Knocked down the TA as predicted. Got the pH into a good place. Upped the CH. Life was good. But I couldn't get the CYA to register - I added small (30gm) doses every couple of days, but just couldn't get it to budge...
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    Replacement speakers for old Dynasty?

    This tub has one 5" and two 2" driver on each (stereo) side. They're missing their grilles and are pretty trashed. The guys I got the tub from mentioned that there's a good (amazon.ca) source for marine speakers, then never gave me the name (annoying...). A minor detail is that there are lots...
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    Hot tub cover repair

    (I hope I'm in the right thread...) 8'x8', two big styrofoam blocks that fold in half, then stand up with the help of a cover lifter. The center seam (where it folds) has blown out starting at one end, and since the PO neglected it rather than fix it while it was small, it's now extended 3'...
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    Starting up a hot tub

    @DangerBoy - Hey, Roj. I'm in a similar situation, but worse. New install of an old Dynasty tub out in the woods, and filled with soft water simply because it was convenient (i.e. the house's plumbing) and nobody told me otherwise. Now that I'm trying to get the chemistry right I couldn't get...
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    Starting up a hot tub

    @DangerBoy - hey, Roj. We just installed a used Dynasty out in the woods (read: well water). We did the initial fill with soft water just 'cause that's how the house is plumbed - it was convenient. Now I get that doing so leads to a pile of potential problems, starting with just trying to get...