Tetra Whisper Air Pumps are designed for situations that produce greater back pressure, such as deep tanks or ponds up to 8 feet deep. Quiet operation, these air pump is for aquarium or ponds up to 300 gallons in size. Whisper aeration pump is suitable for long decorator air stones or multiple air stones. Single outlet accepts standard airline tubing. 6’ power cord. Manufacturer limited lifetime warranty excludes water damage and rubber parts.