AquaNatural Diamond Black Quartz Bio-Substrate 5lb for Aquariums, Gravel seeded Start up bio Active nitrifying Bacteria 2-4mm (BIOFRESH004)
Brand: AquaNatural
Color: Black
Seeded with bio active live nitrifying bacteria
Pure Natural New Zeazand gravel
Use as a primary substrate or mix with Diamond Black Quartz substrate
Cycles aquarium instantly
2-4mm