CATDOLL : CATDOLL: How to cultivate Daphnia and how long does it take to cultivate it?

Daphnia is a small crustacean, which is easy to cultivate. Bottles, cans, and tanks can be used for small-scale breeding; earthen ponds and cement ponds can be used for large-scale breeding. Breeding water temperature: 18-25℃; pH value: 7.5-8.0; dissolved oxygen saturation is usually 70-120%; organic oxygen consumption is 20mg/L. Under normal circumstances, the pond water should be yellow-brown and the water transparency should be maintained at about 30cm. If the water color is too clear, more fertilizer should be applied. If the water color is dark brown or black brown, less fertilizer or no fertilizer should be applied. When applying topdressing, multiple fertilizers should be used crosswise (manure, ammonia fertilizer, nitrogen fertilizer, phosphate fertilizer, etc.), and do not use a single fertilizer, so as to maintain a dynamic balance of various elements in the water.

Generally, indoor cultivation is less affected by weather changes, and the cultivation conditions are easier to control. The disadvantage is that it can only be produced in small quantities. Wooden barrels, glass jars and other containers that can hold a certain volume of water can be used as cultivation equipment. When cultivating, first inject clean water (natural water or tap water) into the culture vessel, and after exposure to the sun for 3 to 4 days, add 1.5kg/L of fresh horse manure, 20g of fertile soil, and 2g of straw or other stems and leaves of non-toxic plants. Manure and soil can be added directly. Cut the grass into pieces and boil it. Then stir it with a wooden stick and let it stand for 2 days. Catch Daphnia from ponds or small rivers and ditches for introduction, and put them into the pond after cleaning and disinfection. When the water temperature is 18 to 25℃, Daphnia begin to reproduce in large numbers after about 3 to 4 days.