I really like this thing. I put it in my 265 gal. So I'm using a Jebao DC-12000 return and this Gyre to move all the water and WOW! I gotta admit I dont have 300 lbs of Live rock in there because I plan on having this tank a long time and expect my SPS take up lots of space. Had to rearrange or reglue some pieces. Also had no idea that my sandbed was so dirty already, but 2 days and 3 filter sock changes later my tank looks clearer. My fish also like to swim one direction at the top of the tank and the other direction at the bottom. I mounted it about 5 or 6 inches from the water line and dont hear any noise yet and the tank is 7ft long and the plate coral I have at the opposite side is recieving plenty of circulation.