Here’s a video of the Skimz Kone Skimmer in action. This cone-shaped skimmer has all of the features of top-of-the-line skimmers, including a bubble diffusing plate, a brand name needlewheel pump, an efficient design, and high quality construction. Additionally, the Skimz Kone protein skimmer functions as both an internal and external protein skimmer and comes in two sizes, the SK1 and the SK2. The SK1 Kone skimmer is rated for aquariums around 210-gallons. The SK2 is suitable for tanks up to 400-gallons.