Aqueon QuietFlow Power Filters and cartridges were designed with the fish and the aquarist in mind. Our patented designs include unique features to enhance water quality and clarity, increase oxygen levels and lessen noise.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. This LED Pro model also includes an LED light that will indicate when to change your filter cartridge.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. Model GPH Tank Size 10 100 GPH 10-20 gallons 20 125 GPH 20-30 gallons 30 200 GPH 30-45 gallons 50 250 GPH 50 gallons 55/75 400 GPH Up to 90 gallons
