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How does the oil removal film device that comes with the fish tank filter not work? How big?What filtering?Pump Head power?
How does shallow sand filter work? Washing and filtering: when the system is in a filtering state, unfiltered water is evenly distributed by self-developed unique water distributor, the water passes through the filler layer in the filter in a laminar flow state (refined average quartz sand/Garnet ).When the water flows through the filler layer, impurities are trapped inside the filler layer.There are multiple evenly distributed water collectors at the bottom of the filter, which collect and extract the filtered water evenly, and the convection filter can make the filter at high flow rate, good filtering effect can still be achieved.Reverse Washing State: With the accumulation of impurities in the filler layer, the loss of internal head will continue to increase.When the loss of the inlet and outlet pressure head reaches the set value, the system will automatically activate the constant pressure device to convert it to the reverse washing state. when the counter washing is completed,The valve changes the d