Description
Hole size: coarse, the hole measures 2mm, works for large filter media, allows water to flow through instantaneous; hose size: fine, works for very fine filter media Good for use with bio balls, zeolite, ceramic media, rock, and crushed coral and any other aquarium filter media Fit perfectly in a variety of filters including canister filters, power filters, sumps, wet/dry filters and pond filtration systems to hold media together and keep aquarium clean
