Hello, I just wanted to let you know my experience of muck munchers. I have been using this product for more than a couple of years and have not had a chance to speak with the septic tank emptying operative. My fear was that maybe I was flushing money down the toilet every month. I asked the operative this time what he thought. Initially he said the tank looked like any other, but after emptying he said, “It was just like silk – that is the only word I can think of – I was able to remove every last drop with no compacted areas”. He had never heard of the product so I gave him the info, which he said he would pass on to other customers who had problems with their tanks.