Also, I never had a UV in my other Aquarium but the one I am buying off of someone here has one. How is this setup? Does it just connect inline with the hose going to refugium?
you need a pump to pump water through it. Or, I guess you can set it up in line with an existing pump. Mine is setup by it self, water is pumped out of the sump and through it and back into the sump.
