I transfered all of my critters from a 40 gallon setup to a new 55 gallon tank. Lesson learned (after) was that it is difficult to fit anything under a 55 gallon tank. Therefore, I resorted to three 5 gallon buckets as a sump The L2 arrived yesterday and I just installed the unit a few hours ago. Here are some pictures of my tank, the setup and the L2 itself. The sump. Left bucket is where water drains and where water is pumped into the L2 scrubber. You can't really see it but I have 4-5 mangroves growing in the left bucket as well...but just for fun not for filtration. Left bucket is also directly connected to the second bucket. The second bucket has activated carbon and is where the L2 scrubber drains (as well as the emergency drain). This bucket connects directly to the right bucket which has my return pump, my auto top off (white bucket on top) and my heater. Very crowded but I had no choice. A closer view of that beautiful L2 scrubber The screen freshly started up. The display!