Saprophytic control: The pathogen is fungi. Diseased carcass injury caused by fungi. The affected area has cotton wool hyphae, so it is called "raw hair". Dip with 3% to 5% saline for 10 minutes to 15 minutes.
Hydra control: The pathogen is a parasite. Water lice parasitic on the cocoon's coat cavity and sacral flaps, sucking body fluids and blood, light to affect health, severe death. Disinfect thoroughly with lime or bleach. Before entering the pond, pearls are bathed with 10 mg/L to 40 mg/L potassium permanganate for 3 minutes to 5 minutes.
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