I have look at a lot of sites on sumps and 'fuges, but still am lost on the pro's and con's for each when comparing. (I ran out of caffeine and my brain is saying no). Any help on this matter would be greatly appreciated. As well, were I to get to the point where I could, would I be able to put the refug between the output of the sump and the input of the tank (assuming I go that route)?