Now I'm wondering if I should switch things up on my brand new build lol. I have a new bare bottom 60 gallon cube running one 6105 from my old 90 mounted on the back glass to the side. It makes a great current which makes a circle around the tank. I had planned on moving my other 6105 over when I shut the 90 down but I like the large swirl one tunze makes around the tank especially since I like a good amount of rock in the tank.