2, the water is very stinky, the color of the mixing shows that the water has been in an anaerobic state.
3, this type of water treatment should be used aeration, so that the oxygen content of the water in the pond to improve, the use of pond bacteria oxidation of COD pollutants in which the aerobic bacteria.
4, aeration treatment, the pond oxygen increase, the sun is good, with photosynthesis of algae to reproduce, the surface of the water green shows that the pond oxygen increase, can raise fish. However, it is best to measure the oxygen content before raising fish, to prevent low oxygen content, causing the death of fish fry.
5, aeration equipment used to raise fish ponds on the general oxygenation equipment, that is, the kind of motor with wheel aeration.