I was browsing the internet to find the best filtration unit for a 55 gallon bimac aquarium, and I stumble across the EcoSystem Mud filter. It claims that you no longer need a protein skimmer when using this unit. Aren't protein skimmers usefull to remove ink, however? Anywhoo, according to the sites that I visited, they all claim that by using Calupra, and a 24 hour lighting cycle on the sump, it produces tons of oxygen, and keeps your water perfectly clear and extremely healthy! Also, the Calupra practically eliminates any other algae. The filter takes practically no maintenence. WOW! Would this be a good choice of filter? Should I also get a protein skimmer?