Ocean Free Activa Block (Options Available)

Super-Charged Activated Carbon Block OF® ACTIVA BLOCK is a super-charged activated carbon block designed to maximize absorption of aquarium water coloration, odours, toxic pollutants (e.g. insecticides and chemicals) and medication.
Ideal for all types of aquarium.
Highly porous natural Bamboo Activated Carbon and Sepiolite Clay minerals are precision-cut into a Cuboidal Matrix Design featuring 1400 micro-tunnels; this greatly increases its surface area and boosts its ability to draw out toxic pollutants from your aquarium water quickly and efficiently.
As a result, this little 500g cube packs the equivalent absorptive capacity of 20kg worth of regular activated charcoal powder, or 40 times its body weight in absorptive power!
FEATURES Advantages at a Glance.
Results equivalent to 20kg (500g) or 10kg (250g) of Activated Carbon Rapid absorption of toxic pollutants, colouration, odours and medication in your aquarium.
No pre-rinsing and holding bag required.
No precipitation and staining unlike activated carbon.
Freshwater and Marine.