- The Hel-X 13 BioMedia for theBioMaster250,350,600, or850and BioMaster Thermo250,350,600, or850includes a replacement BioMedia allotment
- Includes a large surface area across this suspending media form which is ideal for biological filtration
- Allotments contains 0.3 gallons of BioMedia
- Replace your ceramic filter media only when completing a complete tank restart as to not disturb the beneficial biological load
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