Septic tanks are intended to work best with relatively low levels of continuous use, therefore a holiday home is a bit of a problem as it means relatively intensive use only two or three times a year.
If your tank has a smell problem, we suggest a relatively intensive treatment whilst you are there: daily dosing instead of weekly, dosing the product in a relatively large volume of water (at least a bucketful) of a thin ‘soup’ down the plugholes of the room where you may have the smell. This may solve the problem quickly if it is drain related, or it may take two or three visits for the odour to be noticeably different if we need to get the septic tank into better shape.
If there is no problem with the tank, we recommend a daily treatment dosed in the normal way, ie. dissolved and flushed down the loo closest to the tank – eco shock treatment will do this job.