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The sea water around the small pier of Yunsha Island became crystal clear overnight because of the purple ice.

The purple ice is basically placed near the piles at the bottom of the pier, and the changes in the sea water generally follow this pattern, with the piles as the origin, extending outward for about six or seven meters, and the water quality is excellent, and then it begins to gradually deteriorate until it is the same as the normal in the past.

Even so, the effect was beyond his expectations, and he was very satisfied.

Because this was the first field test, the amount of purple ice thrown was not very large. According to the current situation, if it is released in large quantities, the quality of the sea water around Yunsha Island will be greatly improved. Even if due to the limitation of raw materials, the distance of tens of meters or hundreds of meters outside the tidal zone can only be transformed, and its significance is extraordinary.

However, in order to achieve this goal, it is necessary to accumulate a large amount of ice cubes and ice skates in the No. 3 Purple Ice Cave, and according to the regeneration capacity there, it will take time.

In addition, since the sea around the island is in a state of whirling and rushing movement all year round, and the scale of the flow of tides and wave induction, I am afraid that in order to maintain the effect, it will be necessary to repeat the operation at intervals. It will depend on the specific situation.

Jiang Yichen wandered on the dock for a long time before he reluctantly left.

The change in the water quality of the wharf was noticed by the careful Lai Shun'er in the afternoon of the same day, and after being surprised, he reported the matter to Jiang Yichen.

According to his speculation, it is estimated that a large amount of underground spring water suddenly appeared at the bottom of the pier, which led to the abnormal change.

Jiang Yichen felt that this matter would be revealed by others sooner or later, and there was no need to hide it, otherwise it would not be good for everyone to be suspicious.

So he made up a reason and announced it at the dinner table.

He told the crowd not to be surprised. The special phenomenon of seawater near the wharf is the result of a preliminary test of strong water ice purification, which is the latest scientific and technological achievement of the Agricultural Science Institute that developed a special nutrient solution last time.

The Institute of Agricultural Sciences has a long-term cooperative relationship with itself, so the strong water purification ice has also been arranged to be tested on the island.

Lai Shun'er and the others basically believed in Brother Chenzi's words. There is no other reason, the effect of the previous special nutrient solution is obvious to all, and it is the foundation of the island's high-grade agricultural and sideline products.

Anyway. It's always a good thing that the water is clean, but not anything else, at least it looks comfortable for the eye at the moment.

After explaining it to his subordinates, Jiang Yichen continued to accumulate purple ice while paying attention to the changes in the test site, preparing to expand the scope of the test in a few days.

Jiang Yichen soon saw the blue shark drill again. After being separated for a while, the big drill's attitude towards him seemed to be more affectionate. This also made him feel very relieved that his efforts were not in vain.

According to the blue shark's good form, Jiang Yichen felt that the pace of its integration into the Yunsha Island collective should be accelerated.

So he found an afternoon and summoned all the people on the island to the small pier, and let the two sides have a close contact under his strict supervision.

Kiko and Ishisuo'er have already played with Blue Shark. It's an old acquaintance, and I'm not afraid to say hello or joke.

Lai Shun'er and Dou Fucheng were a little nervous, and their hands couldn't help but tremble a little when they stroked the shark, which made Xizi and the two laugh.

Either way, this crucial step was finally achieved. After some time of understanding, I feel that the memory of the big drill is quite good, and the result of this can at least improve the safety and security of the people on the island.

Of course. Sharks are not dolphins after all, and they are not completely reassured. Afterwards, Jiang Yichen reminded everyone that when he was not present, others should try not to contact the shark alone in the short term, and even if they encountered, they should be cautious and pay attention to their words and deeds, so as not to inadvertently provoke it.

At the same time, after the observation of the last two days, Jiang Yichen did not add new purple ice now. The water quality at the quayside remained crystal clear at all times, with little change from the day after launching.

It seems that the effect of this purple ice is still strong.

But in addition to water quality, other changes followed. The most obvious thing is that the number of fish in the vicinity has increased, at least several times.

Eccentrics, mackerel, and pomfret all circle around the concrete piles in groups of three or five. It's as if there's something here that fascinates them. So much so that they rushed over from other places one after another.

Needless to say, there is obviously only one main reason for this, and the only difference between the pier and the past is the change in water quality.

Seeing this situation, Jiang Yichen's mind instantly overturned the widely spread old saying "When the water is clear, there are no fish".

Originally, the old saying meant that if the water was too clear, the fish would not survive. There are many reasons for this, such as the lack of planktonic microorganisms in the water, or the fact that the water is not good for fish to hide.

At the same time, it is also used to warn people or things not to be too demanding. Don't be too harsh, don't be too harsh on problems, and so on.

On the surface, it seems to make sense, but if you dig deeper, you will find that the basis is not so reliable.

Fish live in an aquatic environment and rely on their gills to absorb oxygen dissolved in the water. This is actually not very different from people living on the ground and breathing oxygen from the air through their lungs.

People like fresh and clean air, like forests and meadows, and hate polluting factories, car exhaust, etc. It's the same with fish, but if they have a choice, who wants to live in a dirty environment all the time? As for microorganisms in the water, as long as the number is appropriate, it does not affect the visibility of water quality.

Another example is the Maldives, known as the paradise of the earth, which is a world-famous tourist destination due to its pollution-free and clean waters.

But anyone who has been there knows that there is no less fish than anywhere else on the planet, and the meat is tender and delicious, making an outstanding contribution to the local tourism and catering industry.

If we look back and expand the scope a little more and make it more true, we will find that some of the old sayings and old sayings that are deeply rooted in the folk are actually not very credible. The most famous is the legend of the "boiled frog in warm water", which has been tested several times by some troublemakers who like to drill the horns of the bull, and it has been proven several times that it is a fallacy, the frog is not so stupid and sluggish, and jumped out of the soup pot and escaped long before the warm water was heated into boiling water.

The reason for this is probably because these old sayings were limited by people's vision and taken for granted at the time when they were born.