The Swell Ceramic Hex Bio Media has a large surface area which promotes the growth of bacteria for biological filtration. Toxins such as ammonia and nitrite from your pond are consumed by the bacterial colonies within this media and quickly turn into nitrate which is much less harmful for your fish.
This media is made from kiln fired ceramic which is a popular media material thanks to the ability for large quantities of bacteria growth. As the water flows through the holes of the media, oxygen too passes through, essential to healthy formations.
We advise to replace your media gradually over time as opposed to all in one go, the reason for this is to avoid losing any beneficial cultures which may have built up over time. Doing this gradually will encourage the useful bacteria to spread to the new media.
Small bags - 20x30cm (500g)
Hexagon size - 2cm x 2cm