Chapter 789: Electrician and Welder

Hearing someone knock on the door, other people in the store subconsciously turned their heads to look at the door.

Coincidentally, another acquaintance came.

Electrician Wu stood at the door and looked in. Another old man of similar age was waiting by the sidewalk riding an electric scooter.

"Old Wu, is this here?" The latter raised his voice and asked, his voice high-pitched.

Because the outside was bright and the inside was dark, Electrician Wu squinted his eyes and scanned everyone's faces in turn. His eyes fell on Zhang Zian, and he said in surprise, "Hey, is it you, young man?"

"Master Wu, you are here, come in quickly...is your friend outside?" Zhang Zian greeted him.

Electrician Wu hesitated for a moment, nodded and said, "He is also a retired employee of our factory. His surname is Zhao and he is a welder."

Then, he waved to the man outside, "Come in. Lock the car so that it won't be stolen."

Welder Zhao is a thin old man, his teeth are black and yellow due to years of smoking, and he pushed the door in with a strong smell of smoke. As soon as he came in, he yelled: "Here? Old Wu, are you kidding me? Isn't this a Is it a newly opened store? You see, this thing hasn’t been tidied up yet! Go and find an old store. I don’t trust the new store, and it might close down in a few days!”

With that said, he went to pull Wu Electrician.

Electrician Wu was also a little hesitant, but Zhang Zian had helped him out of a siege in the fish market before, so he was embarrassed to just walk away.

"Master Zhao, right? I completely agree with what you said, but my shop has been operating on this street for more than ten years, and it's not a new shop!" Zhang Zian interrupted.

"Isn't it a new store?" Welder Zhao sneered, pointing to the wall and the floor, "The latex paint has just been painted, and the smell hasn't completely dissipated. It's only been a month since the renovation. You tell me it's not a new store?"

"Good eyesight! You can see it all! This store is indeed new, but the store next to it is also mine. It has been operating on this street for more than ten years. If you don't believe me, you can go around and ask."

Zhang Zian understands the other party's desire to find an old store. Even Taobao, who is omnipotent, wants to buy things from an old store with high sales, so just don't worry, if you want to suffer, everyone will suffer together...

Welder Zhao went out half-believingly, and came back after a while, nodded and said, "That's fine, I've said something wrong."

It didn't matter that no one was watching the pet shop, Zhang Zian sent Lu Yiyun back to look at the shop, and asked, "Master Wu, are you here to see the 24V heating rod?"

Electrician Wu nodded, and couldn't help but glance at the aquatic creatures brought back by Zhang Zian.

"Look at the heating rods, and the fish by the way," he said.

Welder Zhao complained disapprovingly: "Old Wu, I told you not to waste your money. Isn't a heating rod worth twenty or thirty yuan the same? A heating rod worth a few hundred yuan can raise better fish. ? I don't believe it!"

Electrician Wu waved his hands helplessly, "Old Zhao, don't try to persuade me about this matter. I've made up my mind, and it's useless to try to persuade me. The problem is not fish, but safety. You are not an electrician, and you don't understand how dangerous electricity is. "

It seems that before they came, Welder Zhao had persuaded him more than once, but he was determined to buy a safer heating rod, so he rejected Welder Zhao.

"Tell me about you...the older you get, the more stubborn you get!" Welder Zhao pointed at him bitterly.

Wang Qian and Li Kun have a lot of opinions on this welder Zhao. You and Master Wu are not in the same family. Does he eat your rice or use your electricity? Is it worth it to be so lenient? Persuasion once, it's fine if the other party doesn't listen, why bother to persuasion.

Before getting in touch with high-end aquarium equipment, Zhang Zian didn’t feel that high-end equipment was so good, but after actually getting in touch with it, he understood that you get what you pay for, and you get what you get for five cents, but what you get for two is worth what you get. The goods are much more high-end, so you can't accept it.

He brought a 24-volt heating rod imported from Germany to Electrician Wu, "Master Wu, take your time and try it on the spot."

Electrician Wu said with some embarrassment: "To tell you the truth, I really brought a multimeter here..."

He took out the multimeter from his satchel. He didn't take it with him when he went to the fish market last time. This time he was more careful.

"It doesn't matter, you can try it casually. The artificial seawater over there is about the same conductivity as the natural seawater." Zhang Zian pointed to a bucket placed in the corner. The artificial seawater was prepared by Wang Gan and Li Kun under his guidance. Yes, just wait until today's aquarium is in place, after teaching once, they will do it themselves next time.

"Oh, artificial seawater." Welder Zhao said disdainfully: "A few steps away from the sea, what kind of artificial seawater is there? It's purely because of too much money."

Zhang Zian retorted calmly: "You can't say that. The natural seawater near the shore is inevitably polluted, especially near the city. It's nothing more than raising ordinary hand fish. High-grade fish are best matched with artificial seawater, otherwise It hurts too much to die."

Electrician Wu was very interested when he heard the words. He used to pull natural seawater from the sea to save money, but now he feels that the training fish can no longer satisfy him, and he plans to raise some high-quality fish.

"What about artificial sea water?" he asked.

"The salinity of natural seawater is 34%-35%. Prepare artificial sea salt and fresh water, then buy an ordinary hydrometer, and adjust it according to the temperature-salinity-density table attached to the hydrometer." Zhang Zian simply explained After a while, he raised his finger and pointed to the buckets in the corner and emphasized: "However, there are some things you need to pay attention to. When preparing artificial seawater, never use metal containers. Iron, aluminum, copper, etc. are not acceptable."

"Because sea water corrodes metal?" Electrician Wu seemed to understand.

"One is because of this, and the other is because after the metal is corroded, a large amount of metal ions will enter the artificial seawater you prepared. The pollution of natural seawater may not be so serious... You see, I use the cheapest plastic in the supermarket. Barrel." Zhang Zian gestured.

Electrician Wu took a deep breath, "If you don't tell me, I might really use the iron bucket at home to match it, after all, it's strong..."

"Do you have artificial sea salt here? How much is it?" He asked with interest.

Zhang Zian replied: "There are both high-end and low-end ones, it depends on what you want."

"What's the difference between high-end and low-end?" Electrician Wu asked again.

Zhang Zian brought two bags of sea salt for him to compare, "The main components of sea salt are sodium chloride, magnesium sulfate, and potassium chloride, which account for 90%, and the remaining 10% are trace elements. The difference between high-grade and low-grade is here. Low-grade Sea salt contains more than 20 kinds of trace elements, and there are more than 40 kinds of high-grade ones. If you only raise fish, you can buy low-grade ones, and there is no need to waste money. But if you also raise corals and sea anemones, there are not enough trace elements, Their colors just don’t get brighter.”

Wang Qian, Li Kun, and Jiang Feifei were fascinated by what they heard, and felt that they had learned a lot. ...

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