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At 03:31 AM 4/7/2003, Wright Huntley wrote:
>Home rearing has not been practical for most folks, because it needs a
>huge flow of fresh cold water to do it well. Tubifex can tolerate more
>pollution, so can be raised in 10G tanks with sand substrate, heavy
>aeration and frequent water changes.
Wright is correct. It boils down to bioload: in order to raise enough worms
to matter, you need enough water and oxygen to support their bioload, which
is surprisingly large.
I raised both blackworms and tubifex worms successfully for almost three
months. In the small containers I was willing to dedicate to their
husbandry, I was only able to yield a few worms per day, enough for a fish
or two. In the same containers, Grindle worms yield hundreds to thousands
of worms per day, enough for every fish in the house. Of course, Grindle
worms breathe air, which is the difference.