A reliable hang-on-back power filter for aquariums up to 30 gallons, known for its superior filtration and versatility. The AquaClear 30 filter uses a unique multi-stage system with a large media basket that allows use of foam, activated carbon, and biomedia simultaneously for thorough mechanical, chemical, and biological filtration. Its flow rate is adjustable to suit various aquatic environments, and its refiltration feature ensures water passes through media multiple times for maximum clarity. Easy to install and maintain, this filter keeps aquarium water clean and healthy while operating quietly. (Fluval AquaClear 30 Power Filter)