Poured 2 gallons in the d box yersterday. The water level is amost down to the top of the pipes but not draining fast enough for me I think. I perhaps should have treated with hydrogen peroxide first as now I have septic seep in my dbox. Sure hope it drains out and into the field. Got a 50' snake and did both pipes. A bunch of air came out and now have a bit of counter clockwise movement in the water.