Our septic tank is giving us an intermittent problem - to whit, nasty niffs!! It's not a problem outside - the system is working well and the smells are taken high out over the house and away - but rather it is inside the house! We have 2 loos connected and from time to time it is evident that something is not right - and we're pretty sure it's not us! We thought it might be coming through the pipework and up through the bath plughole as this can dry out due to lack of regular usage (it's ok folks - we DO use the shower!!) so we occasionally run some water down just to make sure there is a 'water filter' in the system.
There is a definite odour around the immediate area of the loo and we just can't work out what is causing it, or how to cure it! I have been using 'septic tank' friendly loo blocks but as these are not perfumed it doesn't seem to have helped!
Does anyone have any ideas for a permanent fix, or does anyone know if the UK perfumed loo blocks are safe to use with a septic tank?