The more internal surface area carbon has the greater it’s capacity to absorb odours and the longer it will last. ProGrow use virgin granular 4/12 graded carbon which is a larger size than some other brands, this is the reason ProGrow filters have great airflow. The more dust carbon a filter contains the harder any fan pulling through it will have to work to move air.
ProGrow carbon filters are the result of years of development and testing under real situations and to find the most effective carbon grade and filter design.
ProGrow filters have a 50mm bed, which we believe is the most sensible compromise between lifespan and airflow.
ProGrow filters are constructed from galvanised steel rather than aluminium to make them easier to transport and less likely to become dented (internet sales). They feature clever built-in hanging brackets to aid fitment and come in discreet packaging.
The carbon is sourced from Australia due to it’s consistent quality and unique composition which provides a greater internal surface area than carbon from any other part of the world. Don’t be fooled by other brands marketing their carbon as 4/12, if it’s not Australian virgin granular 4/12 it’s not the same.