
We
borrowed this pic of freeze-dried blood worms from Hikari's website. Since we sell their frozen
and freeze-dried blood worms, we don't think they'll mind too much.
Their frozen ones look bright red. They add extra vitamins to make
them even better.
LA
Pic
Here's a chironomid midge captured from the wilds of Iowa.
Blood Worms or Black Worms? Blood
worms are really the larval form of one of the chironomid midges -- insects
rather than worms. You could compare
them with the transparent glass worms. California
blackworms, on the other hand, are a cousin to earthworm worms. We
used to sell live glassworms captured in the wilds of Minnesota during the
"ice season." Hikari sells them too -- frozen in thin sheets.
Fish like 'em.
LA
Pic
Blood worms leave their tubes in any unused container full of water.
LA
Pic
Iowa black water pond with blood worms on bottom.
Origins: Blood worms
grow wild in ponds, pools, and lakes. We
even find their tubes in aquaria that have set unused for a period of time.
Blood worms live in the mud. Glassworms swim in the water.
Both can produce huge swarms.
LA
Pic
Thawed formerly frozen blood worms -- very tasty to the pickiest eaters.
LA
Pic
Compare them to our free-swimming glass worms. These guys eat fish fry.
LA
Pic
You can crowd glass worms successfully. These have survived three weeks.
Appeal: Fish love the
taste of blood worms – even the pickiest eaters.
The hemoglobin that colors them red is an excellent iron source.
Size: Full-grown blood worms
grow to about an inch. Their size
makes them ideal for two to six-inch fish. Once
they pupate, the smaller fish sometimes have trouble eating them.
Adults. Looking very
much like mosquitoes, the non-biting parents lay their eggs in water and flit
off. Adults live three to five days.
LA
Pic
Bloodworm egg blobs tinted by algae.
Eggs: Look – under the
water -- for blood worm eggs on sticks and grasses near the shoreline.
They look like little blobs of snot with 50 to 700 tiny dots in them –
very much like pond snail eggs, but with lots more tiny dots.
Bring these blobs home and culture them.
They hatch in 24 to 48 hours.
Negative Phototropic: Blood
worm larvae avoid the light. You
could probably get faster growth by putting black plastic sheets over them.
They construct tiny tubes in which they live during the day.
This makes them difficult to harvest.
The pros harvest them at night, when they emerge from their tubes.
Shutting off their aeration also causes them to come out. Harvesting at night also keeps your
neighborhood mosquitoes well fed.
Containers: Covered
plastic shoe boxes will keep out mosquitoes. Uncovered
containers are easier to aerate. You
may want to use a 10-gallon aquarium so you can aerate it. If you've ever put
water-filled containers out to
grow mosquito larvae, you've also grown blood worms.
Foods: Blood worms eat
“micro foods.” You can find
commercial versions or make your own. Pros
raise them on chicken manure, horse manure, and other waste products.
We’d normally recommend mystery snails to clean up the excess food, but
you can easily imagine those rasping tongues devouring tube after tube of blood
worms. Partial water changes may be
necessary.
Feeding Schedule: The
pros use three grams per 1,000 eggs. Have
fun counting the eggs. Just sprinkle
some food on top. You’ll probably
need to monitor and feed every two to six days.
This will help you keep track of their size. Feed
small amounts. Overfeeding can wipe
out your entire culture. Aeration
helps. We garned this info from a
Singaporan doctor presenting an Aqualogy Seminar a number of years
ago. We still hope to visit him in Singapore. Singaporans raise
these critters right in their fish rooms. They put skeeter netting
on their windows.
Water: Good, old
aquarium water or de-chlorinated tap water will work.
Avoid extremes in pH levels. Their
water “wears out” after four to six weeks. Their
waste products "wear out" their water. That's also the
reason we change the water in our fish aquariums.
Starting Out: Start with
a half-dozen containers. Try
different quantities of egg masses in each.
You’ll need to experiment to find out the best procedures for your
purposes. Work with different foods
and blood worm egg amounts. Keep notes to see
what works best.
Harvesting. Net these
guys out at night. Turn off your
airstone and net away. Keep your
excess in the fridge.
Next Generation. If you
let some of your larvae pupate and turn into adults, they will lay eggs in your
uncovered containers. The adults
need no food. They live only to
breed, lay their eggs, and continue the species.
LA.
©
1998,
© 2003, © 2004
LA Productions.

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