Tetra Whisper EX20 Power Aquarium Filter, 20 Gallon

Tetra Second Nature Whisper EX Filter for Aquariums, 20-Gal:EX filterUsed for aquariumsReady to go right out of the boxTime strip technology lets you see at a glance when it is time to replace your filterThe Whisper filter doesn't emit loud sounds but quietly keeps your fish healthy.Scientifically engineered water flow - continuous flushing action prevents debris build upUse with up to a 20-gal aquarium