Biological Filtration
In an aquarium, bacteria convert deadly ammonia from fish waste and food debris to nitrites and nitrates. This critical conversion process is known as the nitrogen cycle, The nitrogen cycle is the essence of biological filtration. Every surface in an aquarium that is in contact with the water develops a film of nitrifying bacteria. Filters are often designed to provide additional surfaces for colonization by bacteria to maximize the effect of biological filtration.
Chemical Filtration
Chemical filtration is the removal of dissolved compounds from the water. For example, aquarium filters often include a compartment that holds activated carbon to absorb dissolved minerals as water passes through the filter. Various other filter media can also be used to remove undesirable compounds.
Mechanical Filtration
Mechanical filtration is the removal of particulate debris. Debris produces cloudiness and an untidy appearance. Materials such as polyester fiber floss, plastic foam, or sponges capture debris as water is pumped through them. Over time, the surface areas of all these media become covered with beneficial bacteria, and they then function as biological filters, as well.
No comments:
Post a Comment