I've been using the MJ1200 with Venturi Kit on the BP2R on our 38 EelWLR tank for almost a year. The MJ made a big difference in output and is much quieter than the Rio. Initially, it did produce a lot of bubbles in the tank and I used the bubble trap with sponge. The outflow bubbling has pretty much stopped and I've removed the sponge from the bubble trap. I've also removed the sponge from the bottom of the output chamber as it trapped too much detritus.
I also run a Remora on the 55 reef with a MJ 1200. Again, much better and quieter than the supplied Rio. I used a short piece of 11/2" ID vinyl tubing to connect the MJ to the Remora as they don't match exactly.
Dick
