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Hydro Sponge filters are perfect for aquarium and small tank filtration. They are capable of moving more water than other sponge filters, are self-weighting and act as mechanical and biological filters.
Simply attach to aquarium airline tubing, supply .05 cfm and filtering begins. For higher filtration rates, a powerhead pump may be attached in place of air power. Stacking doubles filtering capacity. Easy to clean. 1" diameter tube. Overall height may be shortened by cutting tube.