It's going to be a while until I can upgrade since I just spent $230 on the 3166, pump, 0870, and magnet. Even if I can get the 3166 to stop spitting bubbles I might take it out, it is a bit obtrusive in my tank. That is the problem with this hobby, you never really know how things will look and work until they are in your tank and then it's too late. You spend days thinking it through, visualizing it in your tank, waiting for the UPS truck, sometimes it is perfect and sometimes it ends up in the big box of tank stuff under the stairs in the basement.