We have large (ish) 3-chamber septic tank and usually only two people in the house. We have used muckmuncher sachets for 11 months. The tanks were emptied before we started using the sachets. It is difficult to be scientific, but I get the impression: a) the final outflow of liquid is cleaner (but not clear) than it used to be; b) the scum on top of first tank is an even dark colour (more so than previously); c) smell is less.
Our principal ethic is that every product we sell will have an eco-positive environmental impact.
Muck Munchers natural, biological formulation significantly reduces polluting discharges, ensuring that the water released from your septic tank or treatment plant into the soakaway and surrounding soil is cleaner and purer.