MarinePure Biofilter 1.5" Spheres (1 Gallon) - Cermedia
Designed for Ammonia and Nitrite Removal
One MarinePure Sphere has the same surface area as 1,350 plastic 1.5" bio-balls.
Primarily designed to provide deep anaerobic zones for de-nitrification in passive systems.
Live rock substitute-popular among reef hobbyists as a substitute for live rock because it reduces nitrates more efficiently without harming the environment.
Use in sumps, stacked in extra-large filters.