Aquatop AquaFlow AFI-20 Internal Aquarium Filter, 185 GPH, for 20 Gallon Aquariums

The Aquatop AquaFlow AFI-20 is a compact internal aquarium filter with a 2-in-1 filtration and oxygenation design and a recommended aquarium size of 20 gallons. Water is drawn in through a 360° cylindrical intake sponge, passes through a filter cartridge, and returns to the aquarium through a swivel outlet nozzle that can be aimed up to 180° left or right. An adjustable air-intake valve mixes air into the outflow for gentle surface agitation and oxygenation.

Inside the cartridge, water moves through three filtration stages: a filter floss sleeve and the intake sponge trap debris (mechanical filtration), an activated carbon sponge removes odors, discoloration, and dissolved organic compounds (chemical filtration), and a chamber of ceramic bio-media gives beneficial bacteria a large surface to break down ammonia and nitrite (biological filtration).

Features

• 3-STAGE FILTRATION: Mechanical, chemical, and biological filtration in one compact cartridge.
• BUILT-IN OXYGENATION: The adjustable air-intake valve mixes air into the outflow; turn it to set the strength of surface agitation.
• 360° INTAKE SPONGE: Draws water in from all sides at the base of the unit.
• 180° SWIVEL OUTLET: Aim the water flow left or right where you want it.
• EASY MOUNTING: Pre-installed suction cups hold the filter to the inside wall of the aquarium.
• EASY MAINTENANCE: Clean every 2 to 4 weeks; replacement media (AFI20-RCI) is sold separately.

What's Included

AquaFlow AFI-20 internal filter with cartridge and media, airline tubing, suction cup mounts (pre-installed), and owner's manual.

Setup & Care Overview

• Setup: Rinse the intake sponge, bio-media, and carbon sponge in dechlorinated water, mount the filter fully submerged with the suction cups, connect the airline tubing to the air-intake valve, then plug in.
• Maintenance: Clean every 2 to 4 weeks, or sooner if flow drops. Rinse the sponges in aquarium water, not tap water. Replace the carbon sponge about every 4 weeks and the floss when it is heavily discolored or worn.
• Electrical safety: Indoor use only. Use a grounded GFCI outlet, keep a drip loop in the cord, and unplug the filter before putting your hands in the water.