So then, after all the poo banter............ I thought I might ask a few other questions. What about using Ecover Laundry Bleach? Their website says it is safe for septic tanks... http://www.ecover.com/GB/EN/products/ProductDetails.aspx?PId=9015&VId=20019006738&CId=104&NM=Laundry%20Bleach Or what about Ecover Washing Up Liquid? (same again) Thoughts anyone?? (still bucking at the thought of pure poo :Eek!