Can soil be used in the aquarium as a filter medium for an undergravel filter?
The JBL PROSCAPE SOIL varieties are small balls of baked earth. JBL PROSCAPE PLANT SOIL has nutrients mixed inside and this is why its use as an undergravel filter creates a strong flow through the soil. This in turn intensively flushes the nutrients from the soil, leading to a larger quantity than the plants usually need and thus a surplus. The running time is greatly reduced. The bigger problem is the durability of the firing when it is being used as a filter medium for the undergravel filter. The friction and flow subjects the beads to greater wear and tear. As a result, the constant abrasion creates a kind of sludge that causes the filter performance to decrease rapidly. Classic substrate types that allow sufficient water flow are suitable for this type of filtration.