About This HQRP® 6-pack Aquarium Filter Cartridge Replacement for EZ-Change Aqua-Tech Filter Cartridge #3; Compatible with Aqua-Tech 20-40 and 30-60 gallon Aquarium Power Filters; HQRP Aquarium Filter is made of cotton and activated carbon; Trap fine dust particles and other contaminants, avoid them from recirculating; It can filter and absorb 99% of the impurities and fish waste in the aquarium, keeping the water clean and healthy and promoting healthy fish growth; Coarse floss can remove large particles, premium activated carbon can trap dirt, removes odors, discoloration and impurities, and the molded ribbed back has offer maximum water-to-carbon contact; Easy To Install; Switch out in less than five minutes, simply remove the older and dirty filter and change in seconds just shake and rinse; The aquarium filter is washable and reusable ensuring long life; Replace the filter every 2 to 4 weeks for optimal performance or 10 to 12 times per year depending upon usage.
