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Re: Hornwort & anacharis don't grow; freshwater crabs

>From: Jay Dike <jjdike at yahoo_com>
>Subject: Hornwort & anacharis don't grow
>This is sort of an abbreviated post of one I made Jan. 11 about plant
>growth.  I'm wondering specifically if there is something hornwort and
>anacharis especially don't like - because they don't seem to grow at
>all in my tank.  Other plants seem to doing ok.  Water and tank info
>are in the Jan. 11 post so I won't repeat here.
I can't come up with any hypothesis why your Anacharis and hornwort aren't
growing.  Six 40 watt fluorescents over a 50 gallon tank ought to be enough
light.  Does the Anacharis show any symptoms?  Does it get rooted in the
substrate?  Is it getting full lighting, or is it shaded by other plants?
With all those other plants growing all right, perhaps the best thing to do
is give up on the Anacharis and hornwort, at least for this tank.  Try them
in another tank.  Anacharis (Eigeria) requires strong light, and is not
very tolerant of weak light.  Hornwort (Ceratophyllum) also likes strong
light, but, in contrast, tolerates weak light very well.

>From: "Kevin Lowman" <lowman at bellatlantic_net>
>Subject: freshwater crabs
>My son has a viquarium containing about 5 gallons of water, and a large,
>cannibalistic, african clawed frog.  Needless to say, any small fish that we
>add are a tasty treat for the frog.  My son recently saw some freshwater
>crabs as well as some electric blue crayfish, and would like to add them to
>the tank.  Doe anyone know whether this combination would be at all
>compatible? Or would some inhabitant  perish?

If the crabs and crayfish are bigger than the clawed frog, they might be
ok.  Otherwise, they will get stuffed in with lots of thrashing, kicking
and generally gastly table manners.  To be safe, they have to be wider than
the frog's head, measuring from where the jaws hinge.  On the other hand,
if they are bigger than the frog, they may go after the frog!

Paul Krombholz, in foggy central Mississippi.