I bought my house last year and had the septic emptied. They said they found a rag in the tank. It is 4 bedroom house but I am the only one living here. It has worked great until 2 weeks ago. It got very slow. I have about a 200' drain line and it was dry so we dug up 90' and was able to put a balloon up there and also used one at the house.(not at the same time.) It worked for 3 days (had company) then it plugged. Called plumber who came out and used a electric snake went down through the vent. They never really found anything but it did start working. Now it has slowed again-- I do have grey water coming out of drain, more when I use water (washing clothes-dishwasher-shower) but if I use a lot of water it will clog. Question is --do I have something over the inlet or outlet of tank?? Or do I find someone to dig it up or just have it pumped again. Thanks