The DC pumps are a controllable pump and work great for return pumps from your sump. Being able to control the COR by Neptune or Reef Octopus DC pumps is a huge advantage.
We sell different brands of DC water pumps however most are very similar to each other in operation. Aquarium DC controllable water pumps are fairly new to the market and have been a huge selling item since their release. The are very energy efficient, powerful, and fully controllable.