What does a Bio filter and a Denitrification filter do?
Generally speaking, bio filters are more well known than denitrification filters to us. Usually people only remember that there is a bio filter that goes with a mechanical filter in the system, but forget that there is another filter, denitrification filter that is also needed in the tank. This is unfortunate since a single bio filter only completes half of the biological decomposition by itself. The other half of the biological decomposition is only completed by a denitrification filter. While the objective of a mechanical filter is obvious – it removes physical wastes from the water, the objective of a biological filter may not be so obvious. In a broad sense, a bio filter removes the “biological wastes” from your water. But this simple definition does not help much because at the minimum, you need to understand what you want to remove and how you remove the “biological wastes”. What a bio filter really does is to provide a suitable condition for Nitrifying bacteria in your water to
