Koi Pond Dual Box Filter System Foams Japanese Matting 12000L All Pond Solutions
(3) After matting, the water will flow through the filter foams provided;. 4 x Blue Foams (Coarse Grade Foam). 4 x Yellow Foams (Fine Grade Foam). Suitable for Ponds with Small Mix of Fish and Koi up to: 9000 Litres.