Rockbox (Filter Material)

It is a system designed so that the water enters in a different way, on the outside and edges of the roc. More oxygenated water enters, so it will be colonized with aerobic bacteria, and water with less oxygenation will enter the interior and center, so anaerobic bacteria will colonize. It has a feeding system, for a carbon source to feed the heart of the box, so both aerobic and anaerobic bacteria will be created much faster than naturally, faster cycling will be achieved as well as maturation in less time, This box was baptized as rocbox since it is an imitation of the creation of bacteria like in a rock but being able to feed the interior