Ocean Free - Activa Carbon Block 110int For fish that look like

For fish that look like they just came off the reef

External CO2 Ceramic Reactor

to improve water quality

This dose raises potassium by 2 mg/L

Ocean Free - Activa Carbon Block 110int For fish that look likeACTIVA 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