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Re: [Killietalk] Brineshrimp
First, use the coldest water you can for the decapping. Strain the the
decapped cysts through a handkerchief (I use large men's handkerchiefs
because the Clorox will rot nylon nets). I would avoid the soaking in
dechlorinators after decapping. I think that might be your problem. Once
decapped only a cell membrane surrounds the embryo and it will probably
swell on long exposure to fresh water. Also dechlorinators are toxic to
many invertebrates and might be killing your cysts.
Rigorous dechlorination is not necessary, although some protocols
recommend using white vinegar (acetic acid) to neutralize the chlorine.
When I was decapping I would strain the eggs through a handkerchief then
rinse several times with fresh water (my well water is not chlorinated),
allowing each aliquot of water to drain through before adding the next.
A small residual amount of chlorine won't hurt anything. In fact, some
suppliers recommend a drop or two of chlorine be added to hatching
shrimp to minimize bacterial bloom.
Try leaving out the dechlor step, substituting rinses in cold tap water.
Don't worry about the amount of chlorine in the tap water. After
hatching, you can rinse the bbs in dechlorinated water if you are
worried about adding it to your tanks.
Barry J. Cooper
Sweet Home, OR 97386
apistomaster at excite_com wrote:
> Hi Barry, Thank you for such a quick response. I have used typically 1/2 cup plain clorox:1/2 65F tap with soak time of 3-5 min. Shells come off fine. I rinse the cleaned cysts the soak them in fresh dechlorinated tap water for about 5 minutes using plenty of dechlor(SeaChem Prime), then try to hatch them per my ususal method.
> I have several plastic 2.5l. brineshrimp hatcheries bought from Aquatic Ecosystems. The brine is 1 tbs/l of marine mix salt and heavily areated using a med buble size air stone. The hatchery is always covered with a 13 gal plastic white garbage bag and a 13 watt flourescent lamp is enclosed within the cover bag for light and heat. Water temp is always maintained between 80 to 85 F.
> I use Utah eggs from brineshrimpeggsdirect.com, 90% hatch grade. I get great hatches except my de-cysted trials.
> Do you see a fatal flaw? I've been hatching shrimp for 40 years.
> Larry Waybright
> Clarkston, WA apistomaster at clearwire_net
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