11/15/2023 0 Comments Pool time sink to clear flocculant![]() Another general tip that the sand is bad, is when backwashing frequency increases substantially – used to be every two weeks, and now the pressure rises in one week, for example. Getting your hands into the sand too, to check for calcified chunks, or grease balls and such filtration inhibiting things. You can also try a Sand Filter Cleaner chemical, and/or irrigate the sand by removing the top valve or dome, and using a garden hose, plunged deeply into the sand bed and moved around for 30-45 mins, so that the tank overflows (shield pump motor from water). Filter sand is fairly inexpensive, so can be done easily. Small sand filters, with sand depths of less than 12″ may need new sand sooner, often every 2-3 years. Sand can last 5-7 years or longer, on a large size sand filter (large in relation to pool size). Since no DE powder came back into the pool, we can assume that the multiport valve is not bypassing water back to the pool, unfiltered. And of course, excellent water balance (pH/alkalinity/calcium hardness) is also important, and a level of 1-2 ppm of free chlorine, with stabilizer levels (if cyanuric acid is used) below 50 ppm. During summer, most sand filters need to run at least 12 hrs daily, some need 18 hrs – so you may experiment with longer daily run times. Hi Mark, if your water balance and chlorine level is correct, AND, you are running the filter long enough each day, then it could be a filter or filter valve problem. Leave a Reply below if you are having trouble with your pool water clarity – I answer them personally! See our entire line of swimming pool clarifiers, 20 products to improve pool water clarity problems by coagulation of suspended particles! ![]() Some clarifiers may increase pool pH levels.
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