Hi, I was just reading your posts on Envirocare. You mentioned that you sometimes get smells from your system. ARe these smells just outside? We are having a terrible problem with a smell in our main bathroom upstairs and the same smell is also outside. We had a plumber in at the weekend and he said the plumbing is fine and sewer is not blocked, so he said the problem is beyond his remit. he recommended we get our tank checked. Just wondering how yours is working now? Thanks.