The Penn Plax Silent Air B10 Aquarium Air Pump is a must have. This air pump provides a constant supply of oxygen to your fish tank in case of an emergency power outage or for transporting fish. Since this air pump is battery operated, it can also be used for fishing to aerate both bait and your live catch. The unit operates on the battery power from 2D sized batteries; no electric is needed. Air tubing and stone are included to make set up easy. The Penn Plax Silent Air B10 Aquarium Air Pump is safe for both freshwater and marine environments up to 29 gallons. Batteries are not included. Aquarium air pump runs on 2D batteries with continuous operation up to 96 hours. No electric is needed so pump can also be used for fishing.|Pump will only operate when manually turned on and provides a constant supply of necessary oxygen to fish in an emergency.|Aquarium air pump is safe to use in tanks up to 29 gallons. Air pump is also great option for transporting fish. Unit is compact and impact resistant. br/>Sold in Quantity of: 1