Long knowledge! Why do fish tanks in the market put tofu?
When you go to the market to buy fish, have you ever noticed that there is tofu in the fish tank? . A neighbor recently posted an article discussing with netizens why a small amount of fried tofu is put in fish tanks in the market. Some people think it is "fish food", while others point out that it is "melted air bubbles". 01" interview explained that fried tofu actually has the effect of purifying and cleaning fish water, "it's not for fish!".
It turned out that many people thought it was fish food, and some netizens seriously analyzed it, pointing out that tofu is actually a "life-saving medicine" for fresh fish. "A lot of fish will produce nitrogen, and fish with too much nitrogen will lack oxygen and die. A small amount of oil can destroy some nitrogen. Aggregation", "oil can melt bubbles".
Li Caihua, chairman of the Federation of Hong Kong Seafood Industry, told "Hong Kong 01" that the function of fried tofu is actually to "purify water quality". He explained that due to the large number of fish schools, during the trading process of "pick up the fish truck and move them to the stall", the fishbone may stab each other when the fish school struggles, "sometimes the fish will bleed", and when the fish stall uses the oxygen machine to pump out oxygen When the gas is used, the blood will be brought to the surface of the water, "the blood will float to the surface, and the water will be cloudy", so the store put in fried tofu for "absorption and cleaning", "It can absorb the dirt, so the water in the tank is very clean... Customers People will feel hygienic."
Article source:
https://www.facebook.com/photo/?fbid=1207502126863910&set=gm.1108826119779634&idorvanity=550139798981605
https://udn.com/news/story/120911/6823154