Honestly, the most expensive thing I ever bought that I stopped using (not because it broke) was a wet/dry trickle filter that cost me a couple hundred bucks back in the day. It was large and expensive at the time. I don't miss it at all.
Following... I just installed one of those large bubble magus rollers in my RSR500 on tuesday. I'm still in the honeymoon phase of opening up the cabinet a couple times a day just to smile at it. No complaints so farWhy don't you like the filter roller? I just bought the large bubble magus one like 8 inches for my new tank build but haven't set it up yet.