Filter Media
Plastic biological media cubes for canister + HOB filter chambers.
Fluval Bio Cubes TL;DR
Cost: $10-$30.
Plastic biological media cubes for canister + HOB filter chambers.
What it does + use case
Plastic biological media cubes for canister + HOB filter chambers.
Sizing for your tank
Match fluval bio cubes to your filter or tank size. Use manufacturer dose-rate or volume rating.
Setup + maintenance
Follow manufacturer instructions exactly. Replace media when manufacturer-rated capacity expires (varies by media type).
Common mistakes
Replacing all media at once (destroys bio-filter). Skipping pre-rinse. Buying based on price alone.
Cost expectations
Cost: $10-$30. Plan annual replacement budget at 20-40% of initial cost.
Fluval Bio Cubes FAQ
How long does Fluval Bio Cubes last?
Varies by media type - 1-3 months for chemical media, indefinite for ceramic biological media.