1. Water sickness. The body of the purple hanging surface appears to be attached to a cotton-like substance. It is usually caused by the surface body injury, followed by parasitic infection of water embarrassment. Supplementary treatment such as antibiotics and antibacterial agents or treatment such as malachite green or methylene blue.

2. White spot disease. The body, scales, eyes and gills of the purple hangings are covered with small white spots of about 0.5-1.0MM, which are then damaged, ulcerated, and separated. The fish is itchy and will rub the fish against the stones. The treatment method is to increase the temperature of the water to 28 degrees to 31 degrees, for a week or ten days, and take a long-term medicated bath with 2-5PPM of methylene blue for 3-20 consecutive days.