Internal Filters

A quality internal fish tank filter is the heart of any healthy aquarium — quietly working around the clock to remove waste, clear cloudy water and keep your fish thriving. Our Internal Filters collection features a range of compact, submersible filtration units designed to sit inside your tank and deliver reliable mechanical, chemical and biological filtration all in one.

Looking for a simple, effective way to filter fish tank water? Our internal filters are ideal for beginners and experienced fishkeepers alike. They are easy to install — just attach to the inside glass with suction cups, plug in and you are done. No external plumbing, no drilling, no fuss. Adjustable flow control lets you set the current to suit your fish, from gentle flow for bettas to stronger circulation for community tanks.

Not sure which model to choose? As a general rule, look for a filter that can turn over your entire tank volume three to five times per hour. For a 50-litre tank, that means a filter rated at 150 to 250 litres per hour. This ensures your water stays crystal clear and well-oxygenated without creating too much turbulence for your fish.

Each fish aquarium water filter in this collection comes with replaceable media cartridges that are quick and easy to swap out when needed. Many models also include adjustable spray bars or rain bars to help spread the return flow evenly across the surface, boosting oxygen exchange and reducing dead spots.

All internal filters ship Australia-wide from our Sydney warehouse with fast, tracked delivery. Browse the range below and find the perfect filtration solution for your tank today!