Aqueon QuietFlow LED PRO Aquarium Power Filter Size 50

Featured is a LED filter cartridge change indicator light that flashes when the cartridge becomes clogged with debris providing a reminder that it s time to replace the cartridge. A great benefit of the Aqueon QuietFlow filters is the internal pump design that helps dampen noise eliminates leaks and is self-priming meaning it starts up automatically after cleaning or power interruptions. Higher flow rates also ensure a higher dissolved oxygen content for healthier more active fish. There are five total stages of filtration?mechanical chemical biological and an additional specialty pad?for the cleanest clearest healthiest water. Stage 1 ? Dense floss removes particles and debris. Stage 2 ? Activated carbon removes toxins odors and discoloration. Stage 3 ? Patented Bio-Holster provides surface area for beneficial bacteria that remove toxic ammonia and nitrites. Stage 4 ? Bio-Media grid supports additional beneficial bacteria establishment while adding more oxygen. It also reduces splashing