Infinity Series AquaFlow HOB Aquarium Filter – Freshwater & Saltwater

Keep your aquarium water clean, clear, and properly circulated with the Infinity Series AquaFlow Hang-On-Back Filter. Its compact waterfall design provides dependable multi-stage filtration without complicated plumbing or equipment inside the aquarium.

Available in four sizes, the AquaFlow series works well for freshwater aquariums, shrimp tanks, betta setups, community tanks, nano systems, and lightly stocked saltwater aquariums.

Three-Stage Aquarium Filtration

The AquaFlow HOB Filter supports three essential types of filtration:

Mechanical Filtration: The included filter sponge captures fish waste, uneaten food, dirt, and suspended debris.
Biological Filtration: Biological media provides surface area for beneficial bacteria that help maintain stable water quality.
Chemical Filtration: Additional space allows optional activated carbon or other chemical filter media to be added as needed.

Quiet Waterfall Circulation

The waterfall-style return helps circulate and oxygenate aquarium water while providing gentle surface movement. Its hang-on-back design preserves valuable space inside the aquarium and allows convenient access during routine maintenance.

Models and Recommended Aquarium Sizes

Model	Flow Rate	Freshwater Aquariums	Saltwater Aquariums	Shipping Class
AquaFlow 1000	600 L/h / 158 GPH	Up to 20–30 gallons	Up to 15–20 gallons	Standard
AquaFlow 2000	800 L/h / 211 GPH	Up to 35 gallons	Up to 20–25 gallons	Standard
AquaFlow 3000	1,200 L/h / 317 GPH	Up to 55–60 gallons	Up to 35–40 gallons	Medium
AquaFlow 4000	1,600 L/h / 422 GPH	Up to 75–80 gallons	Up to 45–55 gallons	Medium

Aquarium-size recommendations are general guidelines. Stocking level, feeding habits, actual water volume, and desired turnover should also be considered when selecting a filter.

Key Features

Convenient hang-on-back installation
Mechanical, biological, and optional chemical filtration
Quiet waterfall-style return
Helps improve surface movement and oxygen exchange
Compact design preserves space inside the aquarium
Easy access for cleaning and filter-media replacement
No additional plumbing required
Four flow-rate options for different aquarium sizes
Suitable for freshwater and saltwater aquariums

Great For

Freshwater community aquariums
Betta and nano aquariums
Shrimp tanks
Planted aquariums
Beginner aquarium setups
Saltwater fish-only systems
Lightly stocked marine aquariums
Desktop and office aquariums

What’s Included

One Infinity Series AquaFlow HOB Filter
Intake tube
Mechanical filter sponge
Biological filtration media components

Why Shop With Infinity and Beyond Aquatics?

Carefully selected freshwater and saltwater aquarium equipment
Secure checkout and dependable customer support
Knowledgeable assistance before and after your purchase
Tracking information provided when your order ships
Family-owned aquarium business committed to helping hobbyists succeed

Shipping Information

AquaFlow 1000 and AquaFlow 2000:
These smaller models ship at our standard rate and qualify for free standard shipping on eligible orders over $100.

AquaFlow 3000 and AquaFlow 4000:
These larger models require Medium Shipping due to their size, weight, and protective packaging requirements. A flat $18.99 Medium Shipping fee will be applied at checkout. Medium Shipping charges apply even when the order exceeds the standard free-shipping threshold.

Please allow approximately 3–4 business days for order processing and 5–11 business days for delivery. Tracking information will be emailed once your order ships.