Ya, the skimmer and return flow they say should be the same, but the skimmer intake can not take in all the return water unless it is directed thru plumbing right to the skimmer so that is a misconseption. So many things are what works for me in my tank, and that is true, but it may work at the minium but never experience what rality is and how much better there tank could and would be!!!!!!!!!!!!