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    Help with Black Spots/Lines in Pool

    I believe this is my first official post but I have been a long time reader. So let me start off, I don't have my numbers with me but they are within limits (I will run a test tonight). My pool is 4 years old and Pool School (here) has taught me well. With that said, I do need to re-test my...
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    Very Small Bugs in a pool dark blue plaster

    Sorry to make this my first post but I have been a stalker for a long time. You guys have taught me how to care for my pool all without me asking questions. I've learned to keep the water balanced properly and keep it looking crystal clear. Here's my issue.... I have had back swimmers and...
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    Water bugs...

    I'very got similar bugs, did you figure what's best to treat them? My numbers are good but these guys won't go away. They seem to swim so fast that I can only see the shadows of the water ripples.