FILTERS TO 3 MICRONS - A tightly-woven network of interlocking, polyethylene strands filters out even the smallest particulants. Cotton Tails' filtration stands up to the best, including costly, hazardous DE systems. | A LIGHTWEIGHT ALTERNATIVE - This 1.5-lbs. bag is equivalent to 50-lbs. of heavy, hard-to-manage sand. Stop struggling with archaic media and switch to a cleaner, simpler solution. | LESS BACKWASHING - You'll only need to backwash when your tank's PSI reaches 25, saving you time and money. | 90-DAY WARRANTY - Your product comes with a 90 day manufacturer warranty. Your item will arrive damage free with all necessary parts and accessories. If something goes wrong, we'll work tirelessly until you're satisfied with your product.