i have used the bakpak for years and loved it. simple design, worked well. just puts out some micro bubbles in the tank. i never used the bubble trap addtion.
I made myself a knock off based on the aquafuge design. I have it hanging on the front of my sump. I threw in a little chaeto added, a light and it grows pods like crazy!
I had one one my 10 Gallon tank, but didn't have much success with it. Now I run Oceanic Biocube, but don't know how to use fuge on it. I would love to be able to hook the old one to the biocube, but I don't see how...