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Date sent:      	Fri, 22 Dec 2000 21:19:06 -0400 (AST)
From:           	jonathan <fung@is2.dal.ca>
To:             	apisto@listbox.com
Send reply to:  	apisto@listbox.com

> Hi gang! I am having terrible hatch rates with Brine Shrimp cysts (Artemia
> spp.). I am using a heater keeping the hatchery at about 75 F, I used 50%
> seawater and 50% freshwater to achieve a specific gravity of 1.014 (as
> recommended by the package instructions). I use airstones for circulation
> and aeration. I can only guess that the salinity is inappropriate. I used
> to hatch brine shrimp with great success years ago. I seem to remember
> using something like a tablespoon (3 teaspoons) of salt per gallon (1.004
> specific gravity). What salinity level (ppm)/ specific gravity/ teaspoons
> or tablespoons of salt per gallon has been successful for you fellow
> aquarists? 
> Kind regards,
> Jonathan

What I do is I use sea salt one 35mm film canister full to 1 liter of 
tap water. And I DO NOT use airstone, I run a stiff air line tubbing 
to the bottom of the hatching bottle (inverted 1.5L soda bottle with 
the bottom cut off) and let it bubble enough to be sure that no eggs 
will settle at the bottom. I usually get around 75-90% hatch rate 
(depending on the brand of BBS eggs).


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