So when I upgraded I did not take the time to put baffles in my sump. It was fine till I got my new Skimmer. Well now my sump is full of microbubbles. Now I have to go get another tank for the sump and put baffles in it. It is not gonna cost alot seeing as my sump is only a ten gallon but it is a pain. So take my advice add baffles before you set up the sump......