We have an old septic tank and have had it pumped 4 times in the last 8 years. After the heavy rains this winter the tank almost overflowed. We called Pirana Systems and the father (the inventor of the system) Jerry and hid son Justin came out to look at the problem. Both were extremely confident that they could solve it. For under $3,000 we have a system that works because this product aerates the special bacteria that eats up the solids, reproduces itself and after 3 weeks our main chamber looked like the liquid in the photo below. Annual check ups on the air pump and the system is all we now need. A great alternative to a new septic tank and leach field for 1/15 of the cost. Plus, no more pumping which has gone up in price every time. read more