RE: [Killietalk] RE: Hatching brine shrimp

["Kray, Edd" <Edd_Kray at rf.doe.gov>]

Mark, when I said "around 80DF" I did mean "around". I haven't measured
the temp exactly, but just know it's warmer than ambient 65 in my
basement  by the "touch" method. So maybe I am higher than 80 per those
recommendations you quoted. If I move the bulb a few inches one way or
the other to warm or cool, it hasn't made much difference and I still
get the 24 hour hatch. I'm using the Jehmco eggs.

-----Original Message-----
From: Mark Pearlscott [mailto:mark at pearlscott_com] 
Sent: Wednesday, December 31, 2003 6:30 PM
To: 'killifish discussion list'
Subject: RE: [Killietalk] RE: Hatching brine shrimp

Edd,

It is interesting that you heat by the light bulb (80DF, 24hr hatch
rate), as I know many people do.  This has me thinking about temp and
hatching times.  I decided to do a water bath and have my 2 Liter
hatchers in that to get a controlled hatch.  Now here is the interesting
part.  When I set it to 80DF (measured by a thermometer), and ran my
eggs for 24 hours, I did not get a good hatch (salinity was nice and
high... maybe too high?).  I know these eggs hatch at a decent
percentage (90% quoted, NABS eggs), as I previously ran them for a
longer period (at a lower temp and lower salinity) and got a good hatch.
So my temperature/timing doesn't seem to be right for my situation.

Along those lines, I was at a pet store today (Blue Sierra in Issaquah,
WA) (I might have butchered the spelling of the place), and read on the
brine shrimp packages they sold to run the temp between 85-90DF to get a
24 hour hatch.  I bought a brine shrimp net while there (nice to support
good some-what local stores ;)), and on its packaging it said to run the
temp at 80DF to get a 36 hour hatch.  So I'm wondering how some people
run the temp at 80DF and getting good 24 hour hatches.  This doesn't
seem to be my experience so far.  I'm going to try upping my temp to
about 88DF to see if I can shorten the hatch time down to 24 hours.  The
worst thing that can happen is that they all hatch too early or I boil
the little blokes.  Maybe it will do the trick and then I'll be all set.

Mark


-----Original Message-----
From: killietalk-bounces at aka_org [mailto:killietalk-bounces at aka_org] On
Behalf Of Kray, Edd
Sent: Wednesday, December 31, 2003 8:55 AM
To: killifish discussion list
Subject: RE: [Killietalk] RE: Hatching brine shrimp

My brine shrimp light bulb is a 60 watter maintained about 8 inches from
the hatcher. This keeps my water temp around 80 and gives me a nice 24
hour hatching period, so I can harvest every evening around 7PM from the
same hatcher every day.



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