F.O.G Klear uses natural bacterial tablets to help break down a build up of fats, oils & greases that have built up over time. Our tablets are completely natural meaning that no chemicals are used and its safe to handle. This is safe for all septic tanks, drain fields and drains. F.O.G Klear uses billions of beneficial bacteria to safely break down the fats, oils and greases that build up over time in kitchen drains, septic tanks and septic tank drain fields. These bacteria break down the waste back in to oxygen and carbon dioxide without the use of any chemicals.