I ran one on a 450 tall for 3 years. I also ran a small sump with filter socks, ceramic rings and the heaters. Personally I think the sump was needed in my case. The filter socks kept the water a lot clearer than without. I could always tell when they needed to be changed. And I needed a place for the heaters.
I would still use the Ultima though, the back wash, water change feature is priceless.
You can dump 250 gallons in 10 minutes, a real time saver.