Filters for the BIOFILTRE.

The Stars are a porous substrate.

Criss crossed by many minute canals, made to let oxygen, water and inert particles move freely. This is so that the environment stays healthy and clean.

They are self cleaning as dead particles in suspension are easily ejected out while the new born cells replace them naturally. They need no special maintenance. You can rinse them occasionally.  It is best to replace them by half every 6 months.

Their black colour prevents algae growth.