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I have been vacuuming to waste and every time I turn the pump back on it see what appears to be the dust of the algae coming back in thru the jets for a few seconds. How do I keep this from happening?? Seems like all I do is for nothing after that since some is coming right back in!
You can add DE (or equivalent cellulose fiber filter-aid product) to your sand filter to improve its filtration capability. See Adding DE to sand filter and For those of you with sand blowing back into the pool. You can also inspect your sand filter to make sure it isn't channelling from being clumped and you can deep clean your sand filter.