Large ponds are not just a bigger version of a small fish pond. They are a totally different and need a totally different understanding. Trying to use a biological pond filter, simply will not work due to the volumes of water involved.
The addition of large amounts of oxygen allows even large ponds to be circulated. It also encourages wind effects. The addition of 2 large fountains or floating aerators will also do this.
Without oxygen added in this way your pond will accumulate debris that will settle at bottom and the pond will eventually silt up. Oxygen breaks down organic debris and allows the nitrification process to take place.
If you are the owner of a very large pond and do not cater for the addition of the large amounts of oxygen you will certainly end up with dead fish in summer, as the pond water temperature rises.
What is Bioaugmentation?
According to Wikipedia, Bioaugmentation is the introduction of a group of natural microbial strains or a genetically engineered variant to treat contaminated soil or water. In lay terms, with regard to pond keeping is is the addition of pond water treatments or pond water additives in order to cure a particular problem. Examples include adding pond algaecides, pond sludge removers etc ...
All bioaugmentation products work best when combined with oxygen rich pond water. These products are designed to combat the three forms of nutrients commonly found in pond water, namely: carbon (organic), nitrogen and phosphorous nutrients.
Large ponds with excess nutrients will be characterized by excess algae, weed growth and pond sediment build up.
The full article can be read at http://www.garden-pond-filters.com/garden-pond-largepondcare.htm ...
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