I have just purchased a bag of Leslie pool supply D.E. pool filter powder and have a question about it compared to other brands. It seems to per-moisten as to not be as airborne when scooping it out of the bag. I have a 36 sq.ft D.E. filter that requires 3.6 lbs or 7 of Leslie blue scoops (each scoop is suppose hold about .5 lbs) of powder refilling after complete breakdown cleaning . Today I weighted the powder on my digital scale as was scooping and 4 scoops weighted 3.6 lbs, not the 7 scoops as suggested on the bag. Anyone if Leslie's D.E. is treated somehow that is causing to weight more and scoop differently ?