Yellow powder medicated bath usually lasts for three days. Usually, according to the usage of yellow powder, the dosage is different. If it is spilled in the whole cylinder, the concentration should be controlled at about 1.5 ppm, so as not to cause phytotoxicity. If it is a separate medicated bath, the concentration is generally 20ppm, and the soaking time is 15-30 minutes. If the illness is serious, it is necessary to increase the dosage, control the concentration at 50ppm, and soak for 10-20 minutes.

1. Head hole: Head hole disease is one of the common diseases of ornamental fish, which is caused by many reasons, usually due to lack of nutrition. After discovering illness, it is necessary to change water for fish in time, and add calcium carbonate and magnesium sulfide at the same time, so as to supplement nutrition and make fish recover as soon as possible.

2. Bleeding: Hemorrhagic disease is characterized by congestion on the body surface, which is usually caused by poor water quality, and it is also possible that temperature changes cause fish to be stimulated. After illness, the swimming speed of fish will slow down, and they don't eat feed, so they need to take a timely medicated bath with yellow powder. Usually, attention should be paid to maintaining water quality and controlling temperature.

3. Rotten fins: After the rotten fins of fish, the fins will become opaque, and the membrane will fall off, resulting in the exposure of fins. If you want treatment, you need to change water properly and take a medicated bath with yellow powder or antibiotics.