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    Is this algae?

    We are having a warranty repair where there is some rust coming from the shell at the skimmer, so they drained the pool a bit today. This is what I’m seeing: green all over the pebble surface! I keep water so pristine but admittedly don’t brush much. Is this algae, even though FC is always high...
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    Rapid drop in suction flow, can’t figure out why!

    Hello! Pool suction randomly dropped from 40 GPM to 25, and I can’t figure out why. Quad 80 DE filter started at 11 PSI and is only showing 13 now. I cleaned it in on May 25 but wouldn’t it gradually go down, not a rapid drop? It was humming at 40 a couple of days ago and it started at 42 GPM...
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    Red staining on waterline grout

    Our pool is less than a year old and I found this staining near the skimmer. I don’t know if it is rust, but there really isn’t any metal I can see. It won’t come out when I brush it. It is also starting at other spots, very faint. For one, I need to be much better about brushing and cleaning...
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    Normal to go long periods of time without needing to clean filter?

    Pool new in July, cleaned Pentair Quad DE 80 filter once about 4 months ago. Just some spa use since then, no pool, and my water is always beautifully balanced. The recommended cleaning interval has come and gone, but I went from 11 to 13 PSI since that time and 42 to 40 GPM. Feels like it is...
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    New pool - SWG settings?

    Hi friends, brand new pool and loving it - got my Taylor test kit and learning a ton. The pool “pro” set up guy we had assigned from the builder was quite unhelpful. He set stuff up but didn’t really orient me to much and so now I’m left trying to figure it out. He set the SWG to 90% output in...