1. Reason: Feeding water temperature is lower than its minimum tolerance temperature. Long-term in this low temperature state, the immunity of the fish body decreases, do not like to swim, there will be a phenomenon of sinking to the bottom.
2. Treatment: To heat the fish tank, you can use the heating rod to adjust the water temperature. Maintain the water temperature above 30 ℃ and ensure the temperature stability. After about a week, the situation will improve. After the fish no longer sink to the bottom, the water temperature can be adjusted back to the optimum temperature, that is, 28 to 29 degrees Celsius.
1. Cause: Fish eat too full or eat food is not clean, resulting in abdominal fullness, intestinal obstruction. Fish can not be excreted in time, feces accumulated in the intestinal tract. Over time, bacteria breed and infect the intestinal tract, causing enteritis. The belly of the fish is swollen and does not want to swim, so it will sink at the bottom of the tank.
2. Treatment: improve water quality, provide vitamins and use drugs for treatment. Change all the water in the fish tank and let the fish live in the acidic water it likes. A solution prepare from gentamicin, oxytetracycline or furazolidone is sprayed or immerse on that fish body to sterilize it. At the same time, vitamins are added to the water to improve the resistance of fish to bacterial pathogens. Fish can also be treated with drugs such as Nacke bacteria and sulfaguanidine to treat enteritis. When the fish is well, there will be no sinking phenomenon.
