Submersible Internal Aquarium Filter

If your aquarium is showing poor water clarity or weak circulation this quiet internal aquarium filter and submersible pump helps restore cleaner, more oxygenated water in freshwater tanks from 20 to 200 litres. The unit pairs a low-power 6W motor with a maximal flow rate of 500 litres per hour and a lift of up to 0.8 m, and is fully submersible to IP68 standards with a 1.1 m power cord for flexible placement.

The filter box holds two biochemical sponges to provide mechanical and biological filtration while remaining easy to separate and clean. In practice the 500 litres per hour rating produces moderate circulation that can be softened for delicate fish such as bettas by using the low-flow outlet, or redirected with the wave-maker outlet to increase surface agitation and oxygenation. A 12 mm outlet makes the pump compatible with common hose sizes for simple water changes or external routing, and the compact internal design saves space compared with external canister systems.

Key Features

• Efficient sponge filtration with dual biochemical sponges – traps waste and supports biological filtration while being easy to remove and rinse
• 500 litres per hour flow at 6W with 0.8 m lift – provides consistent circulation and modest energy use for small to medium tanks
• Three interchangeable outlets for aeration, wave making and water-change pumping – switch functions without extra equipment
• Submersible IP68 design with 12 mm outlet and 1.1 m cord – compact internal installation and simple hose compatibility for water changes

Frequently Asked Questions

Is this filter suitable for betta, turtle or pond fish tanks?

Yes. It fits 20-200L tanks and is suitable for betta, turtle and pond fish, providing filtration, oxygenation and adjustable flow for aquariums and small ponds.

How do I change between filtration, wave maker and water-change modes?

Use the three interchangeable outlets to switch functions: increase oxygen and filtration, run as a wave maker, or use the water-change/pump mode. Switching is simple and tool-free.

Can I use it as a submersible pump for water changes or hose connections?

Yes. The pump is IP68 waterproof and submersible with a 12mm outlet, compatible with most hose calibres for water changes or circulating water.

How loud is it and what are the power and flow specifications?

It is advertised as ultra quiet. Power is 6W with a maximum flow of 500L/h (134GPH) and a lift up to 0.8m; cord length is 1.1m.

Is the filter easy to clean and maintain?

The enlarged filter box holds two biochemical sponges for effective waste removal. It is easy to separate and clean to maintain water quality and circulation.

Check the recent prices for 4-in-1 Quiet Fish Tank Filter below.