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Aquarium skyscraperAquarium skyscraper

In a garden in Kaltenkirchen, Germany, koi (a variety of domesticated carp) get a view of their pond they could never have dreamt of. Whether they remember it once they leave the tower is another matter.

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Guest: 11 (478 days ago)
Latest comment: partying in the penthouse
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Guest: BombEars (573 days ago)
It is caused by a vacuum between the container and the surface of the pond. You can do a similar experiment with a drinking glass in a sink. Fill it beneath the surface of the water and then slowly raise the glass from the water making sure to keep the mouth of the glass underwater. :)
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NaturalBornWaiter NaturalBornWaiter (572 days ago)
What happens if you pump air in so the fish don't suffocate? Since the air is dissolved in the water, I'd guess the vacuum would still work. Does anyone know for sure?
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TheBob TheBob (572 days ago)
If you pump in air, you'll get an air pocket at the top and the water level will go downin the tower. As long as the water in the pond as a whole is oxygenated and circulates within the tower, the fish will be OK. It must confuse the hell out of the local cats and herons, though.
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Guest: Peter (572 days ago)
link
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Guest: dumb dude (573 days ago)
how does the water stay up there?
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Guest:  (572 days ago)
It's pushed up the tube by atmospheric pressure (which is the same as others are saying, in different words). Like when you suck on a drinking straw. You can lift water about 10 meters this way.
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Guest: calmeryowl (573 days ago)
i would say they created a vacume by sucking out the air and sealing it.
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Guest: Pedant (572 days ago)
Lay the tube horizontal under water. It fills with water. Gently up-end it to vertical keeping the (open) mouth of the tube under water. Place bricks or something at the corners so the mouth is accessible to the fish. (keeping mouth Under the water surface). Simple!
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Humpty Humpty (570 days ago)
I thought everyone did this in school (without the fish) when they were aged 10 or something... Did everyone forget this basic principle, or has the education system gone down the shitter?
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