I rinsed my pool filter sand, but it was easy to do. I have a big spaghetti pot, with a big strainer on top. I lined that strainer with two layers of very fine netting, normally sold for women's garments. Then I filled the strainer half full with sand, sat it on a 5 gallon bucket, and ran water from a hose through it a few times, and it was clean. I did about 30 pounds of sand that way, in less than 30 minutes. Maybe it didn't need it, but this way I didn't have to care.