
I don't know if anyone has used these. I haven't but ran into a pretty good sale (70%) at BRS for them. A 2 kg pack on sale for $7.80.
Chitin infused Bio-Spheres 2kg
Maxspect Nano-Tech Bio-Spheres are made with inert ceramic materials. Added ingredients provide different characteristics, and fire cured above 2300°F, resulting in a very strong and stable bio-media that last for years. Ceramic base, infused with chitin which is carefully extracted from sea...
Here is the Maxspect site that explains more about them.
