I'm running a DCS12000 on my 270 gallon display , and a DC6000 on my 80 frag with (2) deluxe BRS reactors. Have had the DC6000 for over a year, and DCS12000 for about 6 months. All without issues. Plan on replacing the DCS12000 with a DCT15000 (for higher flow) and moving the DCS12000 over and utilizing it in place of the DC6000. They re inexpensive and are very cost effective. Highly recommended!!!!!