The Power Aqua Clear 70 filter features a unique multi-stage filtration system that provides complete mechanical, chemical, and biological filtration for superior water quality. The Power filter has a filtration capacity up to 7 times larger than similar filters. It also allows better contact time with the filtration media. The filter preserves beneficial bacteria, creating a stress-free environment for tank inhabitants and keeping the tank water clear. Its unique waterfall design enables filtered water to return to the tank quietly, gently breaking surface tension and creating beneficial oxygenation.