Re: Hatching Nothobranchius and etc.

[Daniel Katz <dskatz at optonline_net>]

I agree Bob, the pressure  at the bottom of a 55 gallon tank = 1 atmosphere
+ 14 inches of water = 15.3 psia. This can be compared to 14.7 psia ( pounds
per square inch absolute) above the water.  I agree that the difference is
small, but it does affect the egg hatching.
Dan
----- Original Message -----
From: <Rjga at aol_com>
To: <killietalk at AKA_Org>
Sent: Wednesday, April 23, 2003 3:30 PM
Subject: Re: Hatching Nothobranchius and etc.


> In a message dated 4/23/03 3:20:16 PM Eastern Daylight Time,
> dskatz at optonline_net writes:
>
>
> > As long as the cap of the vial is not tight, the eggs in the vial will
be
> > under the same pressure as will the water surrounding the eggs.
> > Dan
> >
>
> One more point. It takes about 30 feet of water to increase gas pressure
one
> atmosphere, and divers usually rest at about 15 feet to equalize during
this
> most important (largest) decompression. A two foot deep aquarium would not
> provide much pressure, even if there were gases to compress.
>
> Robert J. Goldstein, Ph.D.
> Robert J. Goldstein & Associates, Inc.
> Environmental Consultants
> 8480 Garvey Drive
> Raleigh, NC 27616 USA
> tel  (919) 872-1174
> fax (919) 872-9214
> URL   www.rjgaCarolina.com
> e-mail  rgoldstein at rjgaCarolina_com
>
>
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