I am so close to pulling the triger and getting two VorTechs for my 90. I do have 2 questions. The first, is there some form of a night mode. I have seen some video of tanks with the Vortechs with some crazy water movement. I like the look of that but I think it would be tuff for the fish to sleep at night. Also how noisy are the pumps. My tank is in my living room and I want as little noise coming from my tank as possible. Thanks