mrpope
Aquarium Advice Activist
I want a SCWD but I dont have a sump so I cant hook it up to a return pump. I was wondering what closed loop means. Ive seen it mentioned here before but I still dont get it. Is it by using an external pump, or submersible one. Ideally I would want to run it with an external pump and have the SCWD outside the tank, so the only thing you see is an inlet tube and two return tubes. Any thoughts? Suggestions?