Moss grows in shrimp ponds, which is a common phenomenon in crayfish farming. After the moss appears, the moss not only occupies the living space of the crayfish, but also absorbs a lot of nutrients in the water, causing the algae in the water to fail to grow normally. This makes the originally clear water clearer. And once the moss breaks out, the entire aquaculture pond is full of moss, it will be hypoxic, and then the problem of algae will appear, which directly affects the survival of crayfish.

Therefore, when people see moss, they usually take steps to remove and control the moss. At present, quicklime, copper sulfate, plant ash, sodium humate, etc. are commonly used drugs for removing moss. The amount of copper sulfate is difficult to control and is prone to phytotoxicity, so it should be used sparingly. The remaining quicklime, wood ash and sodium humate, otherwise sodium is a good medicine for removing moss.

Why can sodium humate remove moss? It is mainly dissolved in water and forms a shielding effect on sunlight. In other words, the front desk cannot absorb sunlight for photosynthesis, which will eventually cause the moss to shrink and die. In fact, plant ash is almost the same. Is sodium humate harmful to crayfish larvae?

Sodium humate has no effect on crayfish larvae under normal dosage. But it cannot be overused or reused. Excessive or repeated use, especially repeated use, will cause the water body to turn black and the water body's transparency is extremely low, which not only kills moss, but also the algae and aquatic plants in the water will age and die because they cannot accept sunlight. In this way, the water will have the problem of decreased dissolved oxygen, and the crayfish shrimp larvae will also lose a lot of plankton feed. This will directly affect the growth of crayfish shrimp larvae.

So sodium humate must be careful not to reuse it when processing moss. After the most use, if the vegetable does not shrink, it can be reused after 3-4 days. But it cannot be reused multiple times in succession.