I was told by 2 companies I needed an entire new tank and drain field. I was looking at spending my entire savings on my septic problem. I figured even if the aero-stream didn't clear out my drain field, it was a smart thing to use with a new system to keep it running properly. Unbelievably, the aero-stream cleared my drain field, and I haven't seen a hint of overflow. It saved me thousands. Can't recommend enough!