The Hel-X 13 BioMedia for the BioMaster 250, 350, 600 or 850 and BioMaster Thermo 250, 350, 600 or 850.
Hel-X has a large surface area across this suspending media form which is ideal for biological filtration
Replace your ceramic filter media only when completing a complete tank restart as to not disturb the beneficial biological load.
BioMaster 250 – takes 1 pack
BioMaster 350 – takes 1 pack
BioMaster 600 – takes 2 packs