Rplmt Sponge Hydro HS940R Pet Supply. Pet Supply » All Pet Products » Tropical Fish » Ponds » Accessories » Equipment » Filter » Foam Inserts Filter • Filter Resins Filter • Filter Sleeves Filter • Filter Carbon Filter • Filter Pads Filter • Filter Cartridges Rplmt Sponge for Hydro IV HS940R buy bestselling pet products, supply find reviews, ratings, prices Price: $3.99 Features • 4 1/2" Diameter x 4" High [ + Zoom ]   [ Buy Now ] Pet Products : Usually ships in 1-2 business days Non User