The reasons why goldfish may die after aeration could include the following:
Water Quality Issues: When the aerator runs in the fish tank for a long time, it stirs up the organic matter and sediment in the water. These substances sink to the bottom, causing the water quality to deteriorate. The running aerator mixes harmful substances into the fish's living space, leading to the fish's death.
Water Temperature Problems: The aerator creates bubbles on the water surface, causing water flow and bubble breakage. These processes generate heat, raising the water temperature. An increase in water temperature can make the fish's body more vulnerable and even affect the fish's oxygen absorption, resulting in death due to hypoxia.
Excessively High Oxygen Concentration: Fish breathe through their gills to absorb oxygen from the surrounding water. After turning on the aerator, the dissolved oxygen concentration in the water becomes too high. The oxygen concentration in the fish's body may exceed the tolerable level, causing harmful chemical changes in the fish's body, thus leading to death.
Improper Operation: In a small fish tank, if the oxygen supply is too large and there is no corresponding filtration system, the water quality in the fish tank may not be kept clean. The oxygen flow can break up impurities such as fish feces, contaminating the fish's gills and causing the fish to die.
Preventive Measures:
Properly Operate the Aerator: It is recommended to turn on the aerator at appropriate times and under suitable water quality conditions to ensure the healthy growth of the fish.
Maintain Water Quality: Regularly change the water to keep the water clean and avoid the accumulation of organic matter and sediment.
Control Oxygen Supply: Adjust the oxygen supply according to the size of the fish tank and the type of fish to avoid an oxygen concentration that is either too high or too low.
By using and maintaining aeration equipment reasonably, the situation of goldfish dying due to aeration can be effectively avoided.