LA
Pic
Male and female brine shrimp
en flegrante in a petri dish.
Origin. Most of our U.S.
frozen brine shrimps and eggs (really cysts) come from the Great Salt Lake in
Utah or the shallow salt flats in San Francisco (a San Francisco treat).
The Utah shrimps start life larger and grow a bit larger than the Frisco shrimps.
Both these bodies of water contain considerably more salt (nearly twice)
than standard sea water. About the
only other thing that lives in this high salinity environment is the algae that
the brine shrimps thrive upon.
Few Predators. U.S.
brine shrimps live in a predator-free environment.
In Africa and Chile, the flamingos avidly strain brine shrimp with their weird
bills. Their carotene-filled brine
shrimp diet colors their plumage an attractive dark pink (which makes them
suitable for our front yards).
Those same carotenes bring out the reds, oranges, and yellows in our
aquarium fish. Check out the white
flamingos in our U.S. theme parks. They don’t get much brine shrimp.
Small Adults.
Brine shrimp mature at ¼-inch. This
takes only three or four weeks under good (uncrowded) conditions.
Their small size, great taste, and limited mobility make them an ideal
prey for most aquarium-sized fishes.
Frozen Brine Shrimp. Shrimpers
net these guys and flash-freeze them within hours of their capture.
This means they retain all the nutrition their tasty little bodies
contain when captured – including the algae in their innards.
They are much more nutritious than any live shrimps flown in from the
coast. However, aquarium fish love
the thrill of capturing and devouring live brine shrimp.
Live or frozen, your small fishes will gobble up brine shrimp like kids
gobble up M&Ms.
High Salinity. If you
decide to raise these tasty critters, you need (more of a want than a real
need) a hydrometer to measure the dissolved salts in the water.
Sea water runs 1.020 to 1.022. Brine
shrimp grow in much saltier water. Too
much salt reduces their growth rate.
Salt Water in a Box. Commercial
salt water mixes contain all the ingredients you need to make perfect brine
shrimp rearing water. Just add H2O and stir.
These mixes even contain the buffers you need to maintain proper pH.
Some people like to make their own artificial sea water by mixing rock
salt, powdered lime, baking soda, and Epson salts.
But working out the right proportions and pH level is fairly complicated.
LA
Pic
These "warm water" brine shrimp survive amazingly well in this
10-gallon tank.
LA
Pic
The less crowded and the colder the better. Feed them out fast as
possible.
Temperature. Like most
outdoor critters, brine shrimp can adapt to wide temperature variances.
The warmer you keep them, the faster they grow through their life cycle.
Room temperature works fine, but you’ll take four weeks to grow them as
opposed to three. Not much of a problem.
Container. Use whatever
non-metallic container you have on hand. Metal
containers and salt water do not mix. You’ll
need at least 10-gallons of water to make the end results justify all this work.
And you will not grow as many shrimp as you see in the picture above. That’s
½ pint of solid brine shrimp (at least as solid as unfrozen brine shrimp get).
Aeration. You can hatch
the eggs in water that “boils” from the high aeration provided.
The growing brine shrimps need much less water agitation.
A slow air-powered sponge filter will provide aeration and filter their
water with no danger of catching them in its suction. Yes, you can grow
more and faster shrimp if you use a sparger injecting 98% O2
into a reverse flow system if you prefer. Of course, then you’d
also want an O2 meter and a crew to monitor your equipment and
a computer to track your progress.
Light. Strong light
encourages the growth of unicellular algae (their favorite food).
Don’t be disappointed if your brine shrimp eat your algae faster than you can grow it.
Food. Use one of the commercial artemia foods for best results.
Or any of the micro-foods. Or
experiment with yeast, pureed greens, powdered eggs, or powdered milk.
Follow the directions and err on the side of underfeeding.
Make the water just a bit cloudy with the food.
Feed your brine shrimps daily.
Feeding Note: Overfeeding
is the main enemy your brine shrimp face.
Feed them very carefully -- small amounts frequently.
Gut Loading. Since brine
shrimp are filter feeders, they will eat any small particles drifting thru the
water -- even powdered fish foods. Some
hobbyists feed their shrimp special foods they want their fishes to ingest. Lizard
keepers call this gut loading. Some people just like to go the extra two miles.
Harvesting. Net them out
of your container with a regular fish net. The
adults are large enough that they won’t slip thru the mesh.
Smaller ones slip thru to live and grow big
enough to catch later. Feed them directly to your fishes.
A little bit of salt won’t bother your fishes.
If you decide to wash the salt from them, you may need a brine shrimp
net. Rinsing the salt off and adding salt to their water on purpose seems
contradictory to me. Just put them in your tank.
LA
Pic
When the males and females start hooking up to breed, it's time to thin your
population.
LA
Pic
Just a bit too crowded.
Lots of Work. Raising
brine shrimp takes time and effort. However,
watching your fish snap up the shrimp is a fun addition to your fish keeping
hobby. LA.
©
1998, © 2004 LA Productions

3600
Sixth Avenue
Corner
of Sixth & Euclid Avenues
Des
Moines, IA 50313
515
283-0300
Home
Fish
Other
Stuff