- Absolutely natural porous filter media
- Accompanied with quiescent nitrifying bacteria phials
- Provides a more adequate areas for colonization of bacteria than plastic balls, cubes & sponges
- Ideally fits into all canister filters as well as into internal & external bio filters
ELOS Filtra 1 Natural Susbstrate
ELOS Filtra1 has been formulated not only to provide a natural substrate, but also to slowly dissolve as a result of natural solubility and close-proximity bacterial respiration, simulating the processes at work in sediment found in nature. ELOS Filtra1 is a terrigenous material composed of minerals naturally occurring in marine habitats, and therefore brings the hobbyist one step closer to providing a truly representative piece of the natural biotopes.