ISTA Bio Sponge Large
Provides excellent mechanical filtering while oxygenating the water and supports the colonization of bacteria through biological filtration. Can be used with either an air pump or any external filter. Read more
ISTA Small Bio Sponge
Biological filtration: Foam material supports the colonization of bacteria.
• Can be used with either an air pump or any external filter
• Silent operation by reducing air pump noise
• Easy to install and simple to maintain