I just checked to make sure the skimmer will fit and it fit with just a little to spare I am happy that the only other thing I will have in the sump is my return and the phosban sponges. I have the De-Nitrator and a media chamber that are external. If I do this right I will have adequate room under the stand. The return goes literally straight up to the bulkhead and the drain will feed into the skimmer chamber.