Not to start a fight, but that doesn’t make much sense. To follow that logic if I had say a 200 gallon tank, with equal amounts of live rock, live sand, fish coral etc….. If the live stock ratio was the same as my Bio-cube then I would not need a skimmer in the big tank either? I do 15% water changes and still get a good amount from my skimmer. I am not overstocked by any means and did not add the skimmer to run my system on the ‘ragged edge’. I run the skimmer, Cheato and a piece of filter pad which I change monthly. I never had any issue and my tank is crystal clear and beatiful.Not starting an argument just trying to understand and possibly learn something……