If I do go with the refugium and follow the advice how to I connect the refugium to the sump. I have an in sump pump. The water would flow into the refugium but not back into the sump the reason I wanted to connect it with pvc is so I could avoid splitting the overflow hose. I just planned to put in a small powerhead inside the refugium to have a little flow. So I guess my question is if I split the hose how do return it to the sump? overflow on the refugiumto the sump?