I had a new system installed 3 years ago in July of 1996 at a cost of $6000.00. Now I find that my leach field inflitrators are plugged with what they inspectors say is a "greasy" material. It is white and slimy. My tank is filled up and I will have it pumped, although I know this is not the cure. Will this product take care of grease in the leach field? If not, what should I do? Thanks for all your help in advance!!