Create the Biological filtration your pond or aquarium needs with Pinky Filters Bio Balls. Made in the USA, Pinky Filter bio balls come in quantities of 100 which is equivalent to 1 gallon. The total surface area of 1 round, 1.5” diameter Bio ball, is 22.73”.
Mesh Filter Bags for Aquariums
Pinky's 100% polyester mesh bags are made with 4 mm holes and include a zipper for closing. Great for Bio Balls, carbon, or other filter media. Bags make it easy to install, clean, & change media.