what kind of light did you have on your fuge, just remember the fuge light also has to compete with the DT lights/ and it took my tank about 6 months to get rid of the GH from the display. My new build I can't tell if I will get GH yet but I started the fuge almost at the same time I started the tank as soon as the tank cycled I put my fuge in operation Good luck great looking tankYes i think you are correct and i am going to pull it for now, however i do have hair algae growing in display so they has to be some nutrients...