Nautilus DC Return PumpsThe Nautilus DC return pump is an energy efficient and controllable solution for aquarium return pumps. Theyre DC powered and can be adjusted to run as low as 10%. There are 10 different output settings, so you can easily adjust the pump to suit your tanks needs. 3 built in feed timers enable you to choose 10, 30, or 50 minute feed times. The Nautilus control interface accepts a 0 10v analog DC control input, making it compatible with the Neptune