How do you clean the sand in a sand filter?

Answer:
By backwashing. Slowly reverse the flow of water to wash the particles off the sand. The particles will then be suspending in the water above the sand filter, and the water will need to be siphoned out the top of the filter so that the particles do not go back through the sand filter.
First answer by ID2182252871. Last edit by ID2182252871. Question popularity: 2 [recommend question].