POWERFUL: Tetra brand’s most powerful line of air pumps add dramatic bubble effects to customize your aquarium. DEEP-WATER CAPABILITIES: Designed for tanks with significant back pressure – pumps air down to 8 feet deep. VERSATILE: One pump delivers air to all your powered accessories. RELIABLE: Never buy another pump or worry about oxygen in the water. LIFETIME GUARANTEE: The advanced technology and exacting quality standards of this product allow us to offer a limited lifetime warranty (see product packaging for details).