Substart Pro provides optimum biological
decomposition of harmful substances. The colonized material will lower nitrites
even in heavy concentrations. There is very low dust due to abrasion resistance
and has a specially rounded shape that helps to create a current-like water flow
with vortex effect. It has a neutral pH and can be used in freshwater and
saltwater aquariums. Made of sintered quartz material that has an extremely
craggy surface area for intensive bacteria colonization.