Do I have to keep the ceramic media provided?
The ceramic media provide essential biological filtration.
It is your fish’s toilet, bacteria will colonise the media and consume toxic fish waste making the water safer for your fish to live in. Without this water would become very polluted very quickly.
Can I put aquarium gravel in the biOrb?
We strongly advise against putting gravel, sand or small stones in the biOrb. Gravel is likely to reduce filtration and may become lodged in the filter cartridge casing.
