What is foam disease? Why do fish get blisters? How to treat foam disease?

Bubble disease has a great influence on the survival rate of fry, which can lead to the direct or indirect death of fry, mainly in sunny afternoon.

The main reasons are: 1, the temperature rises, too much organic matter in the pond is easy to cause water and fertilizer, so that the dissolved oxygen in the pond is too high, and the gas in the pond is supersaturated, such as oxygen and nitrogen, and the free gas enters the blood through the gills, forming an air plug, leading to bubble disease. 2. The gas produced by photosynthesis or bottom fermentation of benthic algae is directly swallowed by larvae, forming bubbles in the intestine, affecting feeding and other activities, and eventually leading to death. 3. The air pressure or water temperature changes greatly, which easily leads to supersaturation of gas in the seed body, forming air embolism and leading to death.

Prevention and cure method

1, properly deepen the water level to reduce bubble disease and stress reaction, which is also beneficial to heat preservation and improve the survival rate. If it is a pond with poor water quality, the pond or water source with good water quality should be pumped and changed in time. A pond with high dissolved oxygen can also exchange water with an adjacent pond with relatively low dissolved oxygen.

2. Turn on the aerator frequently in sunny afternoons for more than 3 hours, and use 30-50 kilograms of salt per mu/meter of water depth. If the water is too fat, use chlorine preparation to kill algae and pay attention to detoxification in time.

3. Proper use of biological agents such as super spore strains to cultivate zooplankton and inhibit algae reproduction.

4, the appropriate use of povidone iodine and other disinfectants to prevent secondary bacterial infection.