I just got the internal bubble trap for the bakpak and man does it work!! I only write this because I had the old combo box with the external bubble trap and it plain sucked. There were more bubble with it than without it. The internal one goes inside the return chamber where the biobale goes. This one won't work with the rr model, but once I installed it there weren't any bubbles at all. On the other hand, the venturi and maxijet combo don't seem to produce as good a skimmate as the rio. I was expecting to see a big improvement here. Also the maxijet won't fit inside the
surface skimmer like the shop said. Anyone got a seperate style preskimmer to trade for a combo box?
