1. the depth of fish farming is better or shallower, and the depth of fish

farming is different, so it is difficult to have a fixed evaluation criteria. If it's a small fish, it's better to have shallow water, while big fish prefer deep water. For example, if goldfish are raised, the water depth is generally about 30 centimeters, but some species also need 80 centimeters of water to raise. When raising arowana, the water depth should be controlled between 1.2-1.5 meters, otherwise the fish can not swim. If the water for fish

farming is too deep, the first problem to be faced is the decrease of dissolved oxygen. The oxygen content in deep water is usually lower than that in shallow water, so the breathing of fish will be a problem. If it is a fish pond, it will also lead to the growth of anaerobic bacteria due to lack of oxygen. Not conducive to the maintenance of water quality.

2. Poor temperature control: If the water is relatively shallow, the water temperature changes rapidly, so the temperature is relatively better controlled. But the water depth is different. When the water temperature in the upper layer rises, the water temperature in the lower layer remains unchanged, so the growth rate of benthic fish is often affected, and it seems that there is no vitality.

3. Waste of water: Another problem with water depth is that it will waste water, especially if the fish pond is raised, too much water is used, but the amount of feeding can not be increased, so few people dig the fish pond too deep, usually about 1.5 meters.