ZeoFiber is a pure white cellulose fiber produced from wood fiber. ZeoFiber is a renewable resource that is a 100% biodegradable “Green” filtration media. ZeoFiber is a perfect replacement for diatomaceous earth (D.E.). For pool owners with sand and cartridge filters, the addition of ZeoFiber will give your pool water a more polished look and will remove oils not ordinarily filtered out by other filter media