For more than 40 years, Marineland has been committed to fishkeeping success. By applying biological science, advanced engineering and imagination to fishkeeping, Marineland continues to be the leader in innovative aquatic environments & equipment. Today, that spirit of innovation is alive and well at Marineland. Whatever your passion — fresh or saltwater, big or small — count on Marineland to bring you the most reliable, the most technically advanced, the highest quality aquariums and accessories on the market. The Marineland Magnetic Impeller Assembly is a replacement part for Penguin Power Head 550. Keep your equipment running properly, by replacing parts as needed. Your Penguin Power Heads delivers constant flow with fully adjustable aeration and increased surface agitation while remaining silent at all times. The custom air valve regulates air flow, the air filter eliminates noise and dust, and the intake strainer keeps debris from fouling the impeller, giving you great efficiency.