depending on how much you want to spend, i have heard very good reviews on the etss but i currently have the css 220 on my 125gal and its been on for 2 weeks and is working great. alot cheaper you can find it for 149.99.; your choice $$$$$$$$$
not cracking on the cs220 cause i still have one in my closet. But the etss reef devil runs circles around the cs220. I had the cs220 on mine tank since i started it and never could get the nitrates down. The reef devil deluxe costs $279 shipped with the pump, for the difference in money it IS worth it. Coming from someone who has owned both.