How does a sponge filter work?.
Air is pumped through a tube via a pump into the sponge filter. Bubbles rise from the inside of the sponge, pushing water through the sponge walls. This process mechanically collects debris from the aquarium and gives beneficial bacteria a place to grow within the sponge itself!.
This is the basics of how an air sponge filter would work. These types of filters have been around for many a year and are used by both novice and experienced fish keeping hobbyists.
Sponge filters that are placed directly within the tank’s water work really well. Especially for smaller tanks and tanks with small fish and or fry. As they can’t harm themselves or get sucked up inside the filter itself.












