Marina Air Pumps 11110 - Marina 50 Air Pump The Marina 50 air pump combines high performance output with quiet operation. A reliable source of air for increasing water movement and turbulence for proper oxygenation, and can also be used to operate items such as air stones, air curtains and air-actuated ornaments. Ideal for aquariums up to 15 U.S. gal. ( 60 L) 11112 - Marina 75 Air Pump Marina 75 Air Pump combines high performance output with quiet operation. This air pump is a reliable air source for a wide variety of applications requiring the delivery of oxygen to air-operated aquarium accessories such as air stones, air curtains, and air-actuated ornaments, as well as for generating water movement and turbulence. For aquariums up to 25 US gal (100 L). 11114 - Marina 100 Air pump The Marina 100 air pump combines high performance output with quiet operation. A reliable source of air for increasing water movement and turbulence for proper oxygenation, and can also be used to operate