of oxygen? Goldfish is a common species of ornamental fish that consumes a lot of oxygen. Like the same one-meter fish tank, if it is to raise tropical fish, even if the fish are filled, there will not necessarily be hypoxia, but when it is used to raise goldfish, it is only suitable to raise 4-8 goldfish with a body length of about 10 centimeters.
if they don't get oxygen at night? For example, the density of goldfish in the fish tank is very high at ordinary times, which is maintained by constant oxygen, and there are aquatic plants in the fish tank, so once the oxygen is stopped at night, the consumption of goldfish itself and the consumption of plants will easily cause the lack of oxygen in the water, so that the goldfish will die of anoxia. If the goldfish is raised in a bare tank with low density of goldfish and does not rely on oxygen to maintain the dissolved oxygen in the water, then the goldfish can still survive without oxygen at night.
In order not to let the goldfish lack oxygen at night, the feeding time must not be chosen at night, because the goldfish in digestion consumes extra oxygen. For the sake of beauty, the aquatic plants are added to the fish tank for landscaping, and in order to prevent the lack of oxygen in the fish tank at night, the lights can be properly turned on for the aquatic plants for a period of time, so that the aquatic plants can produce oxygen to meet the consumption of oxygen by themselves and goldfish at night.
