Improving Water Quality With A Biological Pond Filter

A high-quality biological pool filter is an indispensable piece of equipment for a well-designed filter system. Biological filtration is a broad term that refers to beneficial bacteria that can purify seawater at a molecular level. In natural streams or rivers, bacteria colonize rocks and gravel at the riverbed, which naturally break down toxins as the water flows from above. This natural process tries to mimic the resulting biological filter. 

However, instead of growing bacteria at the bottom of the pond, as in nature, for easy maintenance, the bacteria are settled in several kinds of bio-filter for pond via that are stored in the filter housing outside the pond. Water is forced to flow through the filter by a pump system or gravity system.

Biological filtration of ponds Mark Laurence's Blog

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Why do you need biological filtration?

One of the main applications of biological pond filters is to convert harmful ammonia, which is noxious to fish and other animals into nitrate. Ammonia is naturally made from fish waste and other decomposers in ponds. Although nitrate is not noxious to all other marine fish, it is a phytonutrient that acts as a blanket to naturally encourage the growth of some species of algae. 

Therefore, it is a good idea to control the nitrate level in your pond. There are several ways to deal with excess nitrate. One option is to use a plant-based filter, which is a separate pool area filled with moisture-loving plants that naturally absorb nitrates. Another way is planned to replace part of the water, which is to replace some of the lake water with new water without nitrate.

Types of biological filters for lakes:

  • Gravity Return Filter
  • Pressure Filter