New design, but not as good as the old one By David on 2/24/13
David wouldn't recommend this product to a friend
I bought two of these and find that I continually go back to the old ones. First, the top is really hard to pri off when it has been in the reactor for a few weeks. I've chipped all around where the top fits on. Second, the old ones can be used for GFO or for carbon. I've observed that when GFO is in there (I know it specifically says catalytic carbon) the GFO doesn't tumble as with the old ones. Third, the blue sponge has so much smaller holes = clogs that much faster. I've used a BRS acrylic housing, same as the ones for GFO or carbon, as a pre-filter with just sponges and still the blue ones clog in a week. It would be far worse is you dose carbon (Vinegar, Vodka, etc). Please bring back the old, time tested cartages.