Pirana uk manufacture a retrofit ABG (aerobic bacterium generator) unit that simply drops into existing septic tanks and sits in your septic tank on the bottom, to breed microbes to clean up biomat clogged drains, it rejuvenates not only the tank, but the drain field, as it solves all three issues Pirana uk have the sole rights to manufacture the P60 ABG and Pirana blend bacteria for the whole of Europe. it is fitted in around 3 hrs , with no groundworks or disturbunce by our trained installers throuout the uk, its only site requierment is a amp socket , its very ecnomical to run useing the equifalant of a 55 watt light bulbfor a free survey contact 07946 556 201 or email piranauk@hotmail.co.uk or for installers in your area call 07946 556 201 mobile 07946 556 201