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RE: Daphnia Questions
The different species of daphnia have their pro's and con's. Depends on
what you want. Moina are very small, culture more densely and at higher
temperatures. They are suitable, one would think, for smaller fish and fry.
The others species are larger, culture less densely and can be kept at lower
temperatures. Perhaps more suitable for larger fish/fry. Again, these are
generalities. Most species will probably work for you. Many of us culture
two or more species, usually a large one and a small one.
I just had a culture come back from the dead after 3-4 weeks of no life in
the barrel in which I keep them. Over-harvesting and poor water quality
will crash the culture. Be patient and they will come back.
Check the archives for lots of good advice on culturing them.
I think that most of their calcium needs will be supplied by what you feed
them. Then again, perhaps you want to experiment with this.
> -----Original Message-----
> From: John Pendergrass [SMTP:pendergrassj at hotmail_com]
> Sent: Wednesday, September 19, 2001 9:45 AM
> To: killietalk at aka_org
> Subject: Daphnia Questions
> I am getting ready to start a culture of Daphnia, however before I do I
> wanted some advice.
> I noticed there are at least 3 types, each being a different size (monira,
> pulex, and Giant Russian).
> Which of these is most useful for us (as killi keepers)?
> I have read claims that the Russian variety is always live bearing and not
> prone to seasons.
> Is this true? Because I also read that Daphnia is live bearing until water
> quality goes down and then males are born and then after heterogeneous
> procreation eggs result and then much difficulty in getting the eggs to
> Also I wanted to know what water parameters are needed. I read that the
> daphnia pull calcium out of the water to build their shells. So dose that
> mean they like it a little on the hard side?
> Any help would be appreciated
> Thank you,
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