check out reefbreeders nautilus return pumps, excellent controllability, low noise and relatively affordable. I used one in my DIY frag tank build and love it.
The Nautilus DC return pump is an energy efficient and controllable solution for aquarium return pumps. They’re 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...