We have a 30 year old home with septic tank. Our basement toilet started gurggling and today dirty water and stuff started coming into the basement from the ejector pump. Not sure when that started happening. We dug three holes in the backyard today and figured out where the clog is. Betweent the kitchen and the septic tank, the pipe is filled with something that looks like wet concrete sludge. Has anyone ever seen anything like this before? We rented a power snake and used a two inch cutter, but haven't been able to clear it. Any ideas? Thanks, Debbie