Bio Sponge Filter for 120L (32 Gallons) and below Aquariums$9.99
Why sponge filters you may ask?
Well, we always recommend sponge filters for small to medium tanks which have small to medium fish genrerally. These are easy to maintain and also provide a space for benificial bacteria to grow which helps break down the ammonia in the tank. Thus it acts as a physical as well as a biological filter.