The fish that are alive and kicking in the market must be
When it comes to buying fish, I believe that everyone will look for some lively fish in the market to buy. This is a recognized fresh fish, but we did not expect that when a thing called fish floating spirit appeared, the fish bought in this way would not be as fresh.
Yes, that kind of thing is called "fish floating spirit". The chemical name of fish floating spirit is sodium peroxycarbonate, commonly known as solid hydrogen peroxide. Sodium peroxycarbonate can quickly dissolve in water at room temperature and release oxygen quickly. Therefore, as long as you add some fish floating spirit to the fish tank, the oxygen content of the water in the fish tank will increase rapidly. In this way, some fish that were originally about to "die" due to lack of oxygen can temporarily extend their lives due to the addition of fish floating spirit.
If it was simply because the oxygen content of the water in the fish tank had increased, there wouldn't be much of a problem. However, sodium peroxycarbonate was not pure oxygen. It was used not only as an oxygen-containing agent, but also as a detergent, a bleach, and a whole dye in the textile industry.
If you use fish flotation to treat live fish too much, the lead and arsenic content of the fish will seriously exceed the standard. Excessive consumption of "fresh fish" treated with fish flotation will cause harm to human health. Therefore, when farming aquatic products, we recommend that you do not use or use fish flotation to treat live fish as little as possible.
Of course, there are also some vendors who often add too much fish floating spirit to the fish tank in order to attract customers. In this case, we should be more careful when buying live fish. Generally, the eyes of normal live fish are clear, and the eyes of fish that originally "only have one breath left" but become very fresh due to the addition of fish floating spirit are cloudy; normal live fish scales are complete and shiny, and fish that rely on fish floating spirit to "hang their lives" have dim scales and even abnormal phenomena such as multiple bleeding.
In short, when buying live fish, we must carefully identify them, and we must not blindly be greedy for "live".
