So I've been a pool owner for 2 years, but something just dawned on me. My house is on septic and when I backwash my pool the outlet is literally about 4 foot away from the pump/filter and just discharges into the grass. I've never really liked this, but doesn't seem to cause any major issues with the grass. However, I just realized that the used DE is also coming out with that water and sitting in the grass. When I mow (assuming the ground is dry) won't some DE be thrown up in the air creating a fairly dangerous situation of me breathing in the used DE?? Does anything change in the makeup of the DE after its used in the pool or do I need to find a different solution to avoid getting lung cancer?!?