We stock a large range of internal aquarium filters to keep your fish tank nice and clean. Internal filters are low cost value for money filters that sit inside the aquarium and provide excellent filtration.
Sponge filters are one of the most basic types of internal filters, they use an air pump to draw water through the sponge to filter the water.
The most common internal filters are powered by a motor. The motor draws water through the filter media, allowing the good bacteria to break down the fish waste. Then pumping the clean water back into the aquarium.