Kockney Koi Filter Foam Set High quality sheet foam can be cut to any size giving a large economical filter surface and can be used in conjunction with filter wadding for sparkling water quality.
3-piece foam packs are available to fit virtually all types and sizes of biological box filters. Normally supplied in three different grades of dimpled foam per set. The most common sizes being approximately 11″ x 17″, 18″ x 25″ and 21″ x 42″. We supply replacement drilled filter foam sets for a perfect fit in our mega range of filters which also includes filter wadding.