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    Black/grey dust on bottom of the pool

    I’ve been dealing with grey dots piles of “dust” for lack of a better word to describe them. They disappear easily when I brush, but then are back the next day. I recently did a partial drain to lower my CYA. Because of that, my PH is high and alkalinity is low. I also had a small green algae...
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    Question about raising Chlorine

    New pool owner here, and this site has been a huge help getting me accustomed to pool maintenance. Thank you! Since inheriting the pool six months ago, my FC and TC have been reading 0. All other levels have maintained the desired range (see below for most recent results) with the exception of...