Paul, a young nerd who is a water testing expert, only looked up from his computer screen when he heard Carl's voice.

"Paul, come and get to know the guy from China that my daughter Rena mentioned — his name is Jeff Chang, and this is his dog Pegasus — and he's a great dog, and he's starring in a movie that's being screened at the Berlin Film Festival, and maybe he's going to win some award......," Carl said.

"Uh, hello, I've heard of you!" Paul greeted Zhang Zi'an a little shyly, and waved to Pegas, "Hello, Pegas! I heard that you acted in a great movie, if it weren't for the fact that I couldn't get out of here, I would also like to go to Berlin to see a movie." ”

Pemmas screamed energetically as a greeting.

"Hello, nice to meet you!" Zhang Zi'an walked over and shook Paul's hand. From Carl's solemn introduction, he knew that this nerd-like expert played a pivotal role in the aquarium.

When Paul shook hands, he found that he was still wearing disposable rubber gloves and quickly took them off.

After the pleasantries, Paul learned of Zhang Zi'an's intention and enthusiastically explained to him the water quality test bench he was responsible for.

Water quality, for fish farming is the foundation of the foundation, especially marine fish, involving water temperature, salinity, specific gravity, PH value, nitrite, nitrate, silicate, phosphate, carbon dioxide, iron, calcium and magnesium ions together to form the hardness and other factors, than freshwater fish requirements are much higher, is a complex system engineering, often discouraged by novices.

The table of the water quality test bench is very messy, with test tubes, measuring cups, catheters, electronic test pens, hydrometers, test strips, reagents, and a large number of drugs and unnamed equipment, almost the entire table is occupied, many things are marked in German, and Zhang Zi'an does not know half a word.

Paul's introduction was very enthusiastic, but Zhang Zi'an's English level was limited to daily conversation, and when he talked about these technical terms, he was timid, and he listened to it for a long time.

Karl saw his embarrassment and interjected: "Paul, stop, our guest has just arrived, don't worry, let him take a look first." ”

Zhang Zi'an has this intention, although the content of water quality testing is complex, but in fact, there are rules to follow, or routines, just like if/else in computer language. He doesn't want to study the principles, he just learns how to operate the instrument, how to analyze the values and how to adjust the water quality.

However, before he returned to Binhai City to inherit the pet shop, he also visited some aquariums in other big cities, and those aquariums did not have a special water quality testing bench, let alone a water quality testing expert, which is the gap in professionalism.

The overall size of the German pet market is far less large than China's, but it is at least a decade ahead of China in terms of professionalism and segmentation.

In addition, the aquarium equipment made in Germany is famous all over the world, but it is not enough to have the equipment, the key is to look at the person who operates the equipment, just like the equipment alone is not good at photography.

Paul smiled embarrassedly and said to Zhang Zi'an, "Okay, you can come to me at any time when you need it." ”

"Thank you. Zhang Zi'an nodded to him gratefully, determined to learn as much as possible in the next few days, as long as he learned Paul's skills, it should be enough to get his own aquarium.

Carl took out two cans of cold beer from the refrigerator behind the water quality test bench and threw one of them to Zhang Zi'an, "Let's go, I'll take you around, if you have any questions, just ask." ”

As far as the eye can see, in the dark aquarium, except for the entrance, the other three walls are filled with aquariums of different sizes, some aquariums are only planted with aquatic plants, some aquariums are kept with corals, and many more aquariums are filled with a variety of fish, presenting a strange underwater world.

Compared to freshwater fish, marine fish are more colorful and swim in the water with their heads and tails under the light of halogen lamps, and each one looks very healthy and energetic.

Zhang Zi'an was dizzying, and his heart was full of envy, how much time, money and energy would it take to build such a huge aquarium.

Suddenly, out of the corner of his eye, he swept to a medium-sized aquarium, and there were two or three round, white things in the corner of the aquarium, which inexplicably startled him, and he shivered, and got goosebumps all over his body!

In the dark aquarium, his trachea seemed to be suddenly clenched, and it became difficult to breathe.

At first, he thought he was wrong, because there shouldn't be anything like that in an aquarium, it's Germany, not Los Angeles, and it's not a low-budget Hollywood horror movie......

However, upon closer inspection, he knew he was right.

It was a few white skulls, half-buried in the sand and pebbles, brown dead wood staggered in the box, and a few emerald green aquatic plants emerging from the skull's eye sockets, swaying gently with the faint current.

There are also several spindle-shaped fish with gray-green bodies and bright red bellies swimming around in the water.

In an aquarium, how can there be skulls?

Could it be that this is a black shop like a human meat bun shop, which specializes in killing customers and feeding them to the fish?

Strange and grotesque imaginations grew wildly in his mind, and he glanced down at Pegas, seriously considering whether to turn around and run away...... However, there is old tea behind them, and even if they are in danger, there is old tea on their back.

"You don't look good, aren't you scared?" Karl said as he took a long sip of beer and stared at his face.

Zhang Zi'an pointed to the skull in the aquarium in fear, "That's ......"

"Of course it's fake, it's my own bad taste!" Karl laughed, "Everyone was startled when they first came, you should come closer and take a closer look." ”

Zhang Zi'an walked over and took a closer look with the tragic mood of not going into the tiger's den, being reluctant to let the tiger reluctant, and not being able to get his wife to be a hooligan.

When he got closer, he found that the skull was indeed fake, similar to the kind of scaring props used on Halloween, but it was far away just now, and there was a visual interference formed by the water body, coupled with the special lighting and atmosphere in the aquarium, so he was mistaken for the real one...... It's really scary to die!

Like the pet shop in Berlin, each display case or aquarium has a label indicating what kind of animal it contains, its habits and how it is raised.

After seeing that the skull was fake, Zhang Zi'an relaxed, wiped the cold sweat on his forehead, and moved his eyes to the label, seeing that the label said Natteri, made in Peru.

In other words, the aquarium is home to the legendary piranha.