I find a lot of people put videos in wtf when really they should just suffice with *science ! There is the explanation!

Adding video to channels (Science) - requested by BoneRemake.

flerta-herta-gurta!

*promote SMART aquatics

I mean, thats a really smart Idea. Inspired me in a sense.

Promoting this video back to the front page; last published Monday, October 24th, 2011 3:18pm PDT - promote requested by BoneRemake.

I figure they had to have laid it down and got all the air out, then tilted it upwards and put it on underwater blocks/feet.

Pumping air out wouldn't work that well, pumping water in would not work very well.

>> ^BoneRemake:

I find a lot of people put videos in wtf when really they should just suffice with science ! There is the explanation!


I dont think you understand 'wtf.'

What the WHAT?!

That's nothin, I saw a whole fish city once

The fish never had a view like that before!

Wow! That's awesome! Such a simple idea - now I've seen it I can't believe I've not seen it before. Great sift.

I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.

>> ^Drachen_Jager:

I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.


Actually, the pressure differential is the samebarely different as a pond the same distance deep.

Be a real pain to get the floaters out of there.

Not really, it would be inverted. The pressure would be negative, causing the swim bladders to swell beyond their normal size and the air within to be more buoyant.

>> ^Payback:

>> ^Drachen_Jager:
I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.

Actually, the pressure differential is the samebarely different as a pond the same distance deep.

>> ^Drachen_Jager:

Not really, it would be inverted. The pressure would be negative, causing the swim bladders to swell beyond their normal size and the air within to be more buoyant.
>> ^Payback:
>> ^Drachen_Jager:
I guess the water pressure accounts for them all congregating at the top. Question is, can they get out again? I can't imagine their swim bladders evolved to be able to deal with a situation like that.

Actually, the pressure differential is the samebarely different as a pond the same distance deep.

somebody failed physics 101.
geez! the pressure in the column is exactly the same as in the pond!

I don't think it's pressure. I think it's temperature. The fish are in the column because the like how it feels. If it gets too hot, they'll move down (or else it will be boiled fish for lunch).

pressure at the top + the water weight = pressure of the pool

This is gonna be long but please bare with me.

The pressure below the surface of any body of liquid is equal to the density of the liquid multiplied by the depth below the surface, multiplied by the acceleration due to gravity. The result is a quantity in pascals, or newtons per meter squared. To this number we add the pressure due to the atmosphere, 101325 pascals; the sum of the two is the pressure experienced by the koi.

The column of water is suspended by virtue of the vacuum that exists at the top of the column, ie. There is no atmospheric pressure pushing down on the column and hence you can 'support' up to 101325 pascals of water pressure within the column before water in the skyscraper would begin to displace water within the pond (this is how simple barometers work). Remember that the pond is under 101325 pascals of pressure, and that as long the pressure within the column is the same as outside there will be no net flow of water. For instance, the maximum possible height of the column would be 10.3 meters (101325/[9.8*1000]).

What all this means is that the water within the column is at a LOWER pressure (and getting increasingly lower towards the top) than the water within the rest of the pond; in a 10.3 meter column the pressure at the top would be 101325 pascals less than at the surface of the pond. So, if a fish looking for food or perhaps increased warmth were to come across the column and swim inside it they would find themselves at a lower pressure than they are designed for. Their air bladders would swell in the decreased pressure, this would in turn lower the density of the fish consequently increasing they're buoyancy forcing them higher into even lower pressure water, eventually trapping them at the top. As more fish find the tower, more fish are forced to the top where they begin to compete for the rapidly dwindling oxygen supply. Furthermore, freshly oxygenated water would not reach the top of the tower as the water flow would be severely limited through such a constriction. In the third clip you can see what MAY be the fish gasping for air.

In conclusion it seems likely that our German friend has succeeded in creating a fascinating death trap for his fish, and I'd bet that he got up the next morning to find that he had killed thousands of dollars worth of koi. This would also explain why we/I have never seen this design before. Of course, I am assuming that the fish lack the necessary muscle power to get themselves out of this situation, which they may well have, but the number of fish so close to one another seems odd to me. I would of thought that if they could easily get out of the column then they would, if simply to find a less crowded location.
Tl;dr IT'S A TRAP

EDIT: I guess I lost that bet as it would seem that the fish do have the necessary oomph to escape. Though I wish no ill will towards our fishy friends I would still be morbidly curious to see the effects of a ten meter tower.

Apparently, it's been done before.

i wonder why all the fish want to be at the top of the tower.