Roger I have 2 x 6000's on a 7095 mc on my 150gal. Wanted to know what is the recommended settings I should have my Tunzes set at. I have very fine sand and the sand piles up on each end of the tank leaving the middle almost bare. Also My 6000's are almost at the top of my tank. Not really understanding the directions and the different settings. Tank is cycling and no live stock in tank at the moment.