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Topic Title: "Flying Fish"
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Created On: 22 December 2011 06:20 AM
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 22 December 2011 06:20 AM
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ebee

Posts: 5672
Joined: 02 December 2004

Will my goldfish suffer from negative water pressure?

What the heck is that Ebee on about? I hear some asking.

Well it`s my wife`s fault!

A few years back we had two goldfish in a bowl.
We also had a spare bowl.
My wife decided that one goldfish per bowl would give them each more space.
I pointed out that this would not double the space each fish had but merely increased their swimming volume by the volume of the other fish so not much gain .
Unless of course you had a pipe going up and over from one bowl to the other.
If you did they would have double swimming area plus.
and might well be described as "flying" (travelling above the water line of the bowls whilst in the pipe from one bowl to the other).

Everyone said "it will never work" so I proved it would with a pipe about 40mm inside diameter and seven goldfish in two large tanks and found that some of them changed tanks quite regularly and some never did (about 130mm above the water line).

Someone gave me a perspex tube about 100mm dia - about soil pipe size and if I make two cuts at 45 degrees and rejoin it at right angles I could make an inverted U about half a metre long each side.

I got to thinking about the pressure inside the tube above the water line.

If you take the water line as zero.
Going down in the tanks the pressure on the fish would increase - it`s what they are used to.
But going up in the tube the pressure would decrease.
Would the fish find this uncomfortable/harmful?

Just imagine you are sat in a restaurant with a fish tank in one corner of the room and another one in the opposite corner.
A see thru soil pipe going up to the ceiling, across the ceiling and down to the other tank and fish swimming over your head.

Flyingfish ??

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 22 December 2011 06:58 AM
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normcall

Posts: 8118
Joined: 15 January 2005

You are getting as bad as JP. thinking of something to do.

Me? I'm getting fed up with fighting my way through a couple of feet of fibre glass 'thrown' into a loft space covering just about everything and the lady of the house saying 'while you are here, could you put a little light in the loft?' Turns out there are two lofts, both full of this yellow stuff and one was boarded with the gap under full of insulation (but still covered on top with the stuff).

I'm getting too old for this job!!

-------------------------
Norman
 24 December 2011 05:18 AM
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ebee

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Joined: 02 December 2004

"You are getting as bad as JP. thinking of something to do."

Thank you for that Norm.

Some people strive for perfection.

I strive to be like (our lad on TV) JP it`s the next best thing!

-------------------------
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Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 24 December 2011 11:10 AM
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Zs

Posts: 2845
Joined: 20 July 2006

ebee, Happy Christmas, I absolutely love that. Get a patent on it quick.

I have always liked the coffee table fish tanks you sometimes see in hotel receptions but you are looking down onto the top of the fish so not getting the full glory of the colours.Nowadays I worry about the socket underneath and all that water. Your idea is really funky and my first Goldfish (Lord Ebb) who made it to thirteen whould have had a ball in between eating his wives (alas poor Flo). Oh, especially if the tanks were hidden. You'd need a pump for pushing any dirt through from time to time. Yep, I'm talking myself into a purchase here.

Next year's Turner Prize winner and a place on the empty plinth in Trafalgar Square?

But do you need to get out more?
Zs
 24 December 2011 02:54 PM
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sparkingchip

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So next time Norman is in a loft and looks under the fibre glass he may find pairs of Perspex pipes, a flow and return, with fish swimming in them.

Personally I was eyeing up the size of the holes burrowed through the fibre glass insulation in the old ladies bungalow loft trying to decide if they formed by squirrels or rats, anyway I decided to keep avoid a conversation on the subject with her.

Andy
 24 December 2011 02:56 PM
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weirdbeard

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Joined: 26 September 2011

Hi ebee, might be too late for that patent! :

http://www.bio-elite.co.za/waterbridge.htm

( p.s, I don't think the pressure up the pipe will be greater than that in the tank, otherwise it wouldn't stay in the pipe! )
 24 December 2011 03:14 PM
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sparkingchip

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I worked for a tropical fish importer whilst I was at school as a weekends and holidays job, it is another of those subjects I have a hidden knowledge of!

Andy

Along with chickens!!
 24 December 2011 05:00 PM
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ebee

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Joined: 02 December 2004

Originally posted by: weirdbeard

Hi ebee, might be too late for that patent! :



http://www.bio-elite.co.za/waterbridge.htm



( p.s, I don't think the pressure up the pipe will be greater than that in the tank, otherwise it wouldn't stay in the pipe! )


Good lad wierd,
Makes me heart glad to know I am not the only one to think of it.
I feel a bit less of a nutter now.
Kind of gives me a bit of creedance.
Thaaas made mee day lad.
Thanks

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 24 December 2011 06:44 PM
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John Peckham

Posts: 7401
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Ebee

Go on I will ask before someone else does, how do you fill the pipe?

-------------------------
John Peckham

http://www.astutetechnicalservices.co.uk/
 24 December 2011 07:17 PM
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ebee

Posts: 5672
Joined: 02 December 2004

Invert it, fill it, put on end caps, re-invert to correct way up place in water tanks, remove end caps, very little air in.

(with the flexible pipe I had two bungs made)

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik

Edited: 24 December 2011 at 07:43 PM by ebee
 24 December 2011 07:18 PM
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ebee

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Alternatively (I tried this with the flexible one) you can use a small long pipe to syphon it out but it takes quite a long time

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 24 December 2011 07:21 PM
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ebee

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I should imagine the "Negative pressure" might be a problem to some fish, especially at 150mm or more above the water and 500mm or 1m might be a bit much for them, someone might know this.

The tube I have that I intend to cut and join into a inverted U would have centre line from water level and to ends of approx 370mm (or 14.5 inches ) allowing the ends at 80mm below water level.


It`s a pity they don`t make soil pipe in transparent or my job would be easier, mind you I don`t think transparent soil pipe would be a very popular item for gen use as a soil pipe apart from scientists and perverts LOL

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik

Edited: 24 December 2011 at 07:31 PM by ebee
 25 December 2011 04:11 AM
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ebee

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Thanks to weirdbeard I`ve looked on the interweb and found a few American sites with a similar idea calling it a "Water Bridge"

Guess that confirms me as an absolute nutter then - oh dear

http://www.animalworldnetwork....qtrailaqki.html


http://gizmodo.com/346527/fish...nough-to-use-it


http://www.instructables.com/i...quarium-in-shallow-ba/

I was in Scotland tother year and visited the Falkirk Wheel - Amazing - I like things like that!

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik

Edited: 25 December 2011 at 04:24 AM by ebee
 25 December 2011 11:23 AM
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weirdbeard

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Joined: 26 September 2011

Hi Ebee, merry crimbo, glad to have helped!
Although no fish involved I have used this principle to help save water- I had a plastic bin to catch rainwater off my garden shed which was overflowing, I stood another bin next to it and made a U-bend of 20mm conduit long enough to to reach the bottom, filled the pipe then dropped a leg in each bin- now they both stay at the same level - no complicated plumbing required!
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