This Marine Metal Bubble Box can aerate up to eight gallons of water and pumps 1.4 STL per minute. It is suitable for use in both freshwater and saltwater. It has a large adjustable, stainless-steel clip. The pump will operate for approximately 40 hours on two D-cell batteries and has beryllium copper battery contacts for longer battery life. It features an impact-resistant and water-resistant case with a rubber booted switch. This boat aerator pump is easy to use and efficient and it is a good choice for marine use.