Chemical Filtration

Granular Ferric Oxide (GFO) is a form of chemical filtration. The purpose of using GFO is to remove phosphates, metals and organics from the water. GFO is typically used in a media reactor or a media bag placed in the sump. The best choice is a media reactor with slow water flow. Slow flow is encouraged both to allow for the GFO to bind impurities and to prevent the GFO from being excessively banged against each other. GFO is a soft substance and excessive flow will pulverize the material. The...

Granular Activated Carbon (GAC) is a form of chemical filtration. The purpose of using activated carbon is to remove impurities and heavy metals from the water. Removing these particles also adds to the water clarity allowing light to reach the depth of the aquarium better. GAC is typically used in a filter, a media reactor or a media bag placed in the sump. The best choice is a media reactor or filter with slow water flow. Slow flow is encouraged both to allow for the GAC to absorb impurities and...