SunSun (HJ311b | HJ411b) Internal Aquarium Filter

Powerful Internal Filtration in a Compact Form

The SunSun HJ-B Series Internal Filters ? including the HJ-311B and HJ-411B ? deliver dependable internal filtration for freshwater aquariums, combining strong water circulation, mechanical filtration, and enhanced oxygenation in one easy-to-install unit.

These submersible filters are ideal for small to medium-sized tanks, offering quiet operation and efficient waste removal. Designed to be placed directly inside the aquarium, they work continuously to clear debris and uneaten food, while simultaneously adding oxygen through their built-in air mixing system.

Whether you’re keeping goldfish, bettas, guppies, or shrimp, the HJ-B series ensures clean, clear, and well-oxygenated water without disturbing your aquascape. The filters are fully submersible, require minimal maintenance, and come with strong suction cups for secure tank mounting.

Key Features:

• Mechanical Filtration: Built-in sponge traps debris and particulate waste for cleaner water.

• Built-in Air Venturi System: Improves oxygen levels by mixing air into the outflow ? no extra air pump needed.

• Quiet Submersible Motor: Designed for minimal noise and vibration, perfect for quiet home or office tanks.

• Compact & Easy to Hide: Slim design blends easily into the tank background without taking up too much space.

• Easy to Install & Maintain: Suction cups provide a firm grip, and the sponge is simple to rinse and reuse.

• Safe & Efficient: Designed for continuous use with energy-saving motors.

Model Comparison:

What?s in the Box:

• 1 x SunSun Internal Filter (HJ-311B or HJ-411B)

• 1 x Sponge Cartridge

• 1 x Air Mixing Tube

• 1 x User Manual

Why Choose the HJ-B Series?

If you’re looking for an affordable, quiet, and efficient filter that?s easy to install, the SunSun HJ-B Internal Filters are an excellent choice. Whether you’re maintaining a planted nano tank or a mid-sized tropical setup, these filters keep your water clean and fish happy ? all with minimal fuss and maintenance.