Zhao welder is a big person, he can provide very little useful information, he repeatedly sighs that he is unlucky, and his mind is not very clear, and he talks over and over again.

Zhang Zi'an found an excuse to end the call with Zhao welder.

Combing through the information he knows so far, he suspects that some kind of creature in the fish tank caused the large-scale poisoning incident, but he is only two or three percent sure, he is not sure whether he should come out of this, if he is wrong, it doesn't matter if he is looked down upon, the key is that it will delay precious time.

Seeing his thoughtful look, Sheng Ke asked, "Did you find anything?"

"Xiao Zhang, if you find anything, just say it bluntly, you can't let go of any suspicions now. Director Chen encouraged. It was obviously a bright spring in March, and the weather was neither hot nor cold, but he and Sheng Ke were sweating.

Ordinary police officers are checking the surrounding residents to see if there are any suspicious people in recent days, and they are calling up the surveillance of the community; the biochemical special police team wearing heavy protective clothing takes turns to enter Wang Mugong's house to conduct a carpet search; and the people's police with dogs carry out the task of blocking the scene and are on standby at all times; if the biochemical special police team does not find the source of the poison for a long time, it may be necessary to send police dogs to enter the house and search for suspicious objects.

The most troublesome thing is that it is not common toxins that cause damage, and it is difficult for the various test strips, reagents, and detectors carried by the biochemical SWAT team to be effective.

There were constant conversations with Director Chen through the intercom, and the pressure from his superiors made Director Chen almost anxious, and although he was extremely upset, at least he remained amiable on the surface.

Zhang Zi'an turned his heart and said to Director Chen: "Director Chen, I suspect that there is a problem with the fish tank in Wang Mugong's house. ”

Sheng Ke and Director Chen's faces froze at the same time.

"Zhang Zi'an, you can't joke at this time!" Sheng Ke Zhengse said.

Director Chen thought a little more and asked rhetorically, "You mean, someone quietly put the source of poison into the fish tank?"

"No, it's not. Zhang Zi'an shook his head, "The fish tank itself is a source of poison. ”

Sheng Ke and Director Chen looked at each other, their eyes full of suspicion, if it weren't for Zhang Zi'an who had helped the police in several cases, they would have driven him aside a long time ago, and they were not in the mood to listen to his nonsense.

Zhang Zi'an also knows that the general public does not know about aquarium creatures, even veteran players of saltwater fish may not really understand, his words sound like a fantasy to ordinary people, but in fact, some aquarium creatures can really cause such serious consequences.

Beneath the deep blue ocean lies many strange creatures that humans can't imagine.

"You mean, some kind of fish in the tank is poisonous?" confirmed Director Chen.

"It could be a fish or something else, it's unclear for now, and unless you can see it with your own eyes, there's no way to know for sure. Zhang Zi'an said.

But it is not easy to see it with your own eyes, because the fish tank is full of water, it is very heavy, and it is not easy to lift it downstairs, and if the fish tank is really a source of poison, it may be dangerous to carry it out rashly.

Director Chen frowned, staring at the closed window of Wang Carpenter's house, weighing the pros and cons repeatedly.

Sheng Ke and Zhang Zi'an both did not bother him with interest.

"How sure are you?"

After half a ring, Director Chen asked with a tense face.

Zhang Zi'an stretched out three fingers.

Sancheng's grasp seems to be very low, but in the current clueless situation, there is already the capital to gamble.

Director Chen was silent for a moment, then waved his hand sharply, "Prepare a gas mask and protective suit for him." ”

"Director Chen, this is ......" Sheng Ke wanted to object, it was too dangerous to involve an inexperienced ordinary person.

"Xiao Zhang, would you like to go in and try it? Of course, there must be some danger. Director Chen confirmed to Zhang Zi'an.

Zhang Zi'an glanced at the police with dogs on standby, if he refused, I am afraid that the police dogs will be dispatched next, the police dogs are much worse than people in toxins, and they may not be able to get out when they go in.

"Okay, come on. He nodded in agreement.

Seeing that he insisted on doing it, Sheng Ke sighed and stopped objecting.

The biochemical SWAT team brought a full set of spare protective equipment, put on a protective suit for Zhang Zi'an, put on a gas mask, and put an oxygen cylinder on his back, and then explained to him some things that need to be paid attention to, and warned him not to run around after entering the house.

It was originally a very cool weather, but after wearing a heavy protective suit, his whole body was like being wrapped in a cocoon, stuffy and hot, and the movement of his joints was greatly restricted, so he couldn't turn back, and he could only turn around if he wanted to turn back, and the surrounding sounds seemed to be blocked and became blurred.

The SWAT checked his air pressure and made sure there was no air leak, so he gestured to him and asked him to follow them into the unit.

Zhang Zi'an moved awkwardly, twisted his body and glanced at Director Chen and Sheng Ke again, they waved at him, their eyes both expectant and uneasy.

There was no elevator in the old residential building, and it was a struggle to climb the stairs every time, and the sound of one's own wheezing and slight hissing was the sound of the slow release of high-pressure gas from an oxygen cylinder.

When he got to the third floor where Wang Carpenter lived, Zhang Zi'an's body was already sweating, beads of sweat rolled down his cheeks from his forehead, or on his eyebrows, it was very itchy, but he couldn't scratch it, and the more he couldn't scratch it, the more he felt itchy.

He forcibly diverted his attention and looked at Wang Mugong's house.

There were a lot of shiny instruments stacked at the door, and the biochemical special police officers were busy testing and moving things on the spot, and they couldn't help but be stunned when they saw Zhang Zi'an's unfamiliar face, and asked through the headset: "Who is this?

"No, he's not a policeman, he's ...... Director Chen came to help. The person who brought Zhang Zi'an over explained.

"Help?" The tone of the SWAT leader was full of doubts, but since it was found by Director Chen, he didn't bother to say anything, maybe there was something unique about this person, "What advice do you have?"

Zhang Zi'an saw the fish tank placed in the corner of the living room at a glance.

It should be said that from the perspective of placement alone, Wang Mugong's fish farming level is much stronger than Zhao welder and Wu electrician, that position is cool and dark, no matter the sun rises and sunset, there is a high-brightness metal halide lamp set up about 30 cm above the fish tank, and there are LED lights for balancing the spectrum next to it, completely relying on artificial lighting.

"I'll go to the fish tank and have a look. He raised his hand and pointed to the fish tank and said, "I think the source of the poison is in the fish tank." ”

"In the fish tank, we have visually inspected the fish tank, and there are no foreign objects. The SWAT team leader shook his head.

Due to the rarity and unknown nature of the toxin, commonly used test strips, reagents, and detectors did not work, and the biochemical SWAT had to consider all possibilities, even the presence of a strong radioactive element hidden somewhere in the room.

"Maybe you just can't see it. Zhang Zi'an said, seeing that the others did not object, he moved slowly and came to the side of the fish tank.

The water in the tank is very clear, and the objects in the water are clear at a glance. There are a few dead fish floating on the surface of the water, and beautiful corals are attached to the craggy living rocks, which has merit in both the scenery and the breeding of corals.

It stands to reason that he should not be able to fish and coral immediately after turning over the tank, maybe Wang Carpenter stopped when he felt unwell halfway through, and casually gave Zhao Welder a few fish to send him away.

The SWAT team leader didn't dare to let him out of his sight, not knowing if he would mess with things, so he came over and asked, "Do you think there is something wrong with these fish? Even if they are poisonous fish, they won't poison themselves to death, right?"

Obviously, there is nothing moving in the fish tank except for the fish. And in common sense, no fish is so strongly poisonous.

Zhang Zi'an said: "Come, help the handle, pour out some of the water in the fish tank, and then take out all the stones in it - pay attention! The water in the fish tank may be very toxic, don't pour it into the sewer!"

Since everyone was wearing bulky protective clothing, the tank was so large that it was difficult to remove the stones without scooping the water out.

The SWAT officers were not very happy to obey the command of him, a civilian, and after consulting Director Chen, they reluctantly moved to help, using all the containers they could find in the house to pour out about half of the water in the fish tank.

Immediately afterwards, the stones in the fish tank were also taken out piece by piece and placed on the water cloth.

With each piece removed, Zhang Zi'an would carefully inspect the corals attached to the living stones, but these corals were relatively common species and should not be the culprit.

The SWAT officer in charge of taking pictures took pictures of the stones very seriously and responsibly.

Someone else was in charge of the video.

The tank was empty, and there was nothing but the sand that had been stirred up.

Everyone's eyes looked at Zhang Zi'an, which means: What now? Let's say that there are no foreign objects in the fish tank.

Zhang Zi'an stared at the last living stone that had been removed, and there were some brown and unremarkable umbrella-shaped corals attached to it, with radial stripes distributed on the umbrella cover, and a circle of slightly wriggling antennae growing evenly on the edge of the umbrella cover.

Since the fish tank is placed against the wall, the live stones attached to the brown coral are located on the side against the wall, which is not visible from the front and can be easily ignored.

It is almost certain that Wang Carpenter should not have known that these brown corals were growing quietly in his fish tank because they were ugly and no one would go out of their way to buy them.

Zhang Zi'an couldn't guess whether Wang Carpenter saw this group of hidden corals when he turned over the tank last night, and whether he tried to clean them up, in short, they went crazy.

He breathed a sigh of relief, pointed to the brown corals and said, "They are the source of poison you want." ”

In the common sense of ordinary people, the brighter the thing, the more toxic, and the less striking the thing is, the safer it is.

"What is this?coral?" the SWAT officers said suspiciously, "Are you sure?"

Zhang Zi'an nodded, "These are sand anemone corals, don't underestimate them, the toxin they release is called rock sand anemone toxin, which ranks 8th in the world's toxin rankings, and higher than it is Clostridium botulinum, radioactive element polonium-210, diphtheria toxin and the like, as long as 21 micrograms can poison an adult weighing 70 kilograms - 21 micrograms, the unit of measurement is not grams, not milligrams, but micrograms, which is 0.000021 grams." ”

He also pointed to the metal halide lamp above the fish tank, which was strong and emitted strong heat, "These corals sensed the danger and released toxins in the water, first poisoning the other creatures in the fish tank, and the poisonous seawater was evaporated into the air by the halogen lamps, and was inhaled by Wang Mugong's family, Zhao welders and firefighters, resulting in poisoning." ”

In the list of common highly toxic organisms on the Internet, you can never find the coral of the sand anemone genus, but the toxicity of the rock sand anemone toxin released by them is dozens of times more toxic than the notorious blue-ringed octopus or chicken heart snail, and there is no cure, even a slight inhalation can cause acute poisoning.

In fact, it is not uncommon for rock sand and sea anemone toxins to poison marine fish players, these dangerous corals often attach to live rocks and sneak into people's fish tanks, grow up slowly, and release toxins once they feel threatened by their lives.

If the lamp used by Wang Carpenter is not a metal halide lamp, the evaporation rate of seawater will be slower, and the degree of poisoning will be lighter, after all, this lamp is too hot, like a small sun.

The SWAT officers had a lot of experience in handling dangerous goods, but it was the first time they had heard of such a terrible coral, and they were all speechless.

"Report!Director Chen, the source of the poison has been found, it's ......" The team leader reported to Director Chen by radio, he glanced at Zhang Zi'an, "It's the coral in the fish tank." ”

"What? repeat!" Director Chen couldn't believe his ears, thinking he had misheard. There was such a big commotion, and the culprit was actually coral?

"It's not an ordinary coral, it's a very poisonous coral, called a sand anemone coral. The team leader explained as best he could.

Director Chen was both surprised, but at the same time relieved, no matter how he finally found the source of the poison, he could let the experts sent by the provincial department go home, and at the same time, the nature of this incident has also changed fundamentally.

He then asked, "Is there a possibility of deliberate poisoning?"

The team leader couldn't answer this question and motioned for Zhang Zi'an to answer.

"Report to Director Chen, I don't think it was intentional poisoning. Zhang Zi'an said, "It should be accidentally brought in from the live stone bought by Wang Mugong." ”

"Where did you buy the living stones?" Director Chen sternly instructed: "Find out where he bought the live stones, and then go and search the shop, how can such a dangerous thing be bought and sold at will!"

Zhang Zi'an secretly regretted, I am afraid that the aquarium that sold the live stone to Wang Carpenter will be unlucky, and it will be difficult to continue to open the store in the future with such a big thing for some reason.

"Director Chen, may I tell me how to do these corals?" the team leader asked.

Director Chen pondered for a moment and said, "Seal it up first and bring it back to the bureau, pay attention to safety." ”

SWAT officers carefully sealed the living rocks and corals in boxes.

There was nothing to do with Zhang Zi'an here, he went downstairs by himself, walked out of the door of the unit, took off his gas mask, and let the breeze blow his sweaty cheeks.

"Amazing, Xiao Zhang!" Sheng Ke walked over excitedly.

"Fortunately, I was not dishonored. Zhang Zi'an said with a smile.