What a pump!!!
I just disconnected a cheap air pump from one ten gallon tank and hooked the tank up to a Marinland "Aquamaster 3000". Now both 10 gallon tanks are running off of one pump. from here out I will refer to the Marine land pump as the little froggy as it looks like a green frog. The little froggy is rated for use in up to 90 gallon tanks; for me it is powering an undergravel filter and a small (2 inches) air stone in one tank, and a pneumatic sea chest (air makes lid open) and a four inch blue air stone. the little froggy's two air lines can each be regulated for air output right on the pump without using a gang valve.