Description
Cirax – Ceramic Granulate
JUWEL Cirax are highly porous ceramic-based pellets which, due to their extremely large surface area, create the perfect environment fulfilled the bacteria. In your JUWEL filter, Cirax helps to ensure excellent water quality.
Using a special basket, tailored to the size of your JUWEL filter, makes it easy to use, whilst the optimised filling quantity means a long service life of up to a year.
Characteristics of JUWEL Cirax:
Excellent water quality due to effective biological cleaning
Extremely large surface area due to highly porous filter material
Suitable for use in freshwater and saltwater aquariums
Cirax / Tank & BioFlow Filter Compatibility
Please use the below details to choose the correct Cirax Cartridge sizes for your filter/tank.
Cirax M (Compact)
matches the following BioFlow Filters and tanks.
JUWEL Bioflow Filter M – Filter System
and
JUWEL Lido 120
JUWEL Lido 200
JUWEL Rio 125
JUWEL Rio 180
JUWEL Rio 240
Cirax L (Standard)
matches the following BioFlow Filter and tanks.
JUWEL Bioflow Filter L – Filter System
and
JUWEL Rio 300
Cirax XL (Jumbo)
matches the following BioFlow Filter and tanks.
JUWEL Bioflow Filter XL – Filter System
and
JUWEL Rio 450
JUWEL Cirax Ceramic Granules in SG
Cirax is JUWEL’s high-porosity ceramic bio media, granules riddled with microscopic tunnels that give an enormous internal surface for nitrifying bacteria to colonise. Slotted into a Bioflow filter using the matching basket, it becomes the workhorse biological stage, the part doing the steady, invisible job of converting fish waste into less harmful compounds and holding water quality steady between cleans.
This is the media we tell Singapore keepers to disturb the least. In our warm 27-29C tanks the bacterial colony on ceramic media is what carries a stocked community, and a long service life of up to a year means you rarely need to touch it. When you do clean the filter, give Cirax only the lightest swish in old tank water and leave it in place, because rinsing it under the chlorinated tap or replacing it wholesale would wipe out exactly the colony you spent months building.
Match M, L or XL to your Bioflow basket and explore the rest of our JUWEL aquariums range. To see how ceramic compares with other options, read our bio media comparison and ceramic ring guide.

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