SAFE & NATURAL REPLACEMENT FOR DE! 3 LBS REPLACES 25 LBS OF DENow you can quit using DE that is harmful to you and the environment. Zeofiber is the perfect replacement for hazardous DE. It is pure white cellulose fiber that works just as well as DE, but it is safe to use and 100% biodegradable. Since you only use 1 lb of Zeofiber vs 8 lbs of DE, you save money and maintain sparkling clean water.