Originally Posted by Jack22
I'm a little confused about what you mean? I don't have a sump so I got a little Rio submersible pump to put in the tank. It feeds directly into the UV
and the return from the UV
empties right back into the tank. It does about 100gph max.
What I mean is if you have two separate pumps only half the water passes through the uv
so its half as effective if all the water passes through it its much more effective because none of the parasites or bacteria bypass the uv