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 making the return exceptionally quiet. Stage 5 – Specialty filter pad option for additional carbon, ammonia reducer or phosphate remover. All filters use Aqueon Replacement Filter Cartridges and Aqueon Specialty Filter Pads. QuietFlow LED Pro 10 – Medium cartridge. QuietFlow LED Pro 20, 30 and 50 – Large cartridge. QuietFlow LED Pro 75 – two Large cartridges. Change filter cartridge every 4 weeks for best results.

Aqueon QuietFlow Power Filters feature four stages of filtration – mechanical, chemical, biological and wet/dry – for the cleanest, clearest, healthiest water. Higher flow rates ensure higher dissolved oxygen content for healthier, more active fish. The internal pump design helps dampen noise, eliminates leaks and starts up automatically after cleaning or power interruptions.
HighlightsAuto-start, self-priming filter
Lifetime Warranty
No wheel to stop turning
Bio-Pin Wet Dry Technology

Product FeaturesHigher Flow RatesAqueon filters have higher flow rates than the competition to ensure proper turnover for cleaner water and higher dissolved oxygen content, making fish healthier and more active.
Superior Biological FiltrationThe patented biological grid has a large surface area to support more of the beneficial bacteria that eliminates ammonia and nitrates. A second wet/dry grid provides further biological filtration and oxygenation as the water returns to the aquarium.
Internal Pump DesignSince the filter pump is submersed in the aquarium, there is no need for priming at setup or when restarting the filter after cleaning or power interruptions. An internal pump also allows for virtually silent operation, continuous flow raters, less chance for leaks, and a much thinner profile.
Four Stage Advanced Filtration SystemStage 1: Dense floss removes particles and debris.
Stage 2: Activated carbon removes toxins, odors and discoloration.
Stage 3: Patented Bio-Holster removes toxic ammonia and nitrites.
Stage 4: Diffuser grid removes additional toxins while adding oxygen for more active fish. It also reduces splashing makes the return exceptionally quiet.

QuietFlow Comparison Chart Gallons per Hour Size Replacement Cartridge Size QuietFlow 10 100 6.4"x3.8"x6.3" QuietFlow 20 125 7.4"x4.4"x7.9" QuietFlow 30 200 8.4"x4.6"x7.9" QuietFlow 50 250 8.4"x4.1"x7.9" QuietFlow 55/75 400 12.9"x6.6"x8.4"