A DC aquarium pump is a type of pump that is powered by direct current (DC) electricity rather than alternating current (AC) electricity. These pumps are commonly used in aquariums, as they offer several advantages over traditional AC pumps.

DC pumps are typically more energy-efficient than AC pumps because they can be controlled by a variable speed controller, which allows the user to adjust the flow rate to match the specific needs of their aquarium. This can help to reduce energy consumption and save money on electricity bills.

DC pumps also tend to be quieter than AC pumps, which can be beneficial in a living space where noise levels need to be kept low.

In terms of use, DC pumps are often used in aquariums for water flow and return for circulation, protein skimmer and other similar purpose to help maintain the water quality, move water through filters, and create waves and currents in the water to mimic a natural environment for the inhabitants.

DC pumps are often available in different sizes and designs, with different flow rates and head pressure capabilities, to help ensure compatibility with different aquariums and filtration systems.