Koi Pond Floaters and Sediment Handling Tips

Floaters and sediments in the pond water of a koi pond can reduce the transparency of the pond water due to the entry of koi feces or algae and other fine particles of dust. These causes of clouding include both visible dirt and dirt so small that it cannot be seen by the naked eye. At night, you can try to a strong flashlight to irradiate the water in the pool, at this time that can be seen through the sharp one-way light floating particles in the water, a phenomenon known as the "Tyndall phenomenon"; during the day seems to be a high degree of transparency of the pool water, in fact, there are still floating solids can not be seen with the naked eye.

Solid substances floating in the water of a fish pond, which can be seen by the eye, are not soluble in water and have suspended and insoluble properties, and these substances are called suspended substances or SS, or planktonic substances, and so on. For a more detailed description, the particle size ranging from 1 nm (nm=1/1,000,000mm) to 1 μm (μm=1/1,000mm) is called a colloid. 

To remove the solids, remove the fine solids by making them into larger solids.However, this is only possible with the use of coagulants, and such a water treatment method requires a high degree of skill and equipment, which is not used for koi breeding. To remove large organic matter from the water, biofilm substances (biofilm filtration) and rapid filtration methods can be used. Activated sludge method at the sewage treatment plantThe activated sludge method at the sewage treatment plant can be seen in the surface of the coffee-colored sewage tanks, where air (oxygen) is blown out from the aeration pipes and bubbles are constantly rising upwards. This type of activated sludge method is a type of biological treatment, and there are many variations of the standardized method.

For solids in a tank, there are natural settling (or gravity settling) and forced settling methods depending on their size and weight. Sinks for settling these solids are called settling tanks or sedimentation tanks. The sedimentation method for purifying koi water is more or less the same as the sedimentation tanks used for sewers, etc., but the construction is not exactly the same because the flow rate of the water and the size of the sediment are much smaller.

When organic matter dissolved in water is differentiated by water treatment method, it can be classified as good, ordinary and poor; biofilm method (contact oxidation) is evaluated as ordinary, and activated carbon and ozone methods are evaluated as good.

Many people mistake the meaning of sludge and activated sludge as being the same. In fact, the two mean different things. Sludge refers to the turbid substances in water, the mud formed after natural precipitation means. Activated sludge is a man-made strong aeration treatment of things under the turbid water for a long time to the air blowing, after stopping the aeration, the coagulation of sludge will be precipitated, so the sludge is called activated sludge. That is to say, activated sludge is not sludge, corresponding to the oxygen demand of water biochemistry, sludge containing hydrogen or phosphorus, such as aerobic bacteria, protozoa, and the nutrient source required by the afterlife, and so on, and this collection of some microorganisms is the activated sludge. The activated sludge made from the collection of these microorganisms is called activated sludge method to do water treatment.

This activated sludge method requires a high degree of skill, so even in koi breeding there are ways of imitating it, but they should be different from this activated sludge method.