Bio balls are the workhorse of biological filtration: their structure gives nitrifying bacteria plenty of room to colonise, converting harmful ammonia and nitrite into safer nitrates. Use them to top up or refill the media in most bio filters — in ponds, aquariums and fish tank or aquaculture systems. They are an easy, low-cost way to boost the bacteria that keep your water safe.

Good to know:
– Sold individually or in 5L and 6L bags
– High surface area for beneficial bacterial colonies
– Durable, long-lasting biological media
– Fits most biological filter systems, from pond biofilters to aquarium and fish tank setups