Daphnia, yeast, and stuff

["John M. Burns" <jmburns at pressroom_com>]

>From: Chris Graseck@LUDL on 10/12/98 11:20 AM
>Subject:  Daphnia, yeast, and stuff
>
>Can Daphnia be cultured without using light and green water?  I.E. using
>potato emulsion.  I don't have space to set up anything requiring light at
>this time but I think that I could make some room in an aquarium cabinet
>for a small  dimly lit culture.

Potatos only would be an interesting experiment.  I keep my Daphnia magnum
under light 17 hours a day, though. D. magnum is phototrophic.  D. pulex
seems indifferent. 



>Date: Mon, 12 Oct 1998 08:51:32 -0700
>From: "David W. Ranney" <dranney at alvord_k12.ca.us>
>How big of a container to you keep your daphnia in?

I keep the Daphnia in 25 liter, opaque plastic containers.  The Container
Store sells them as picnic baskets as they have a clip on top (if you want
to use it), but I've seen them in other stores (Target) cheaper as just
utility boxes.  Each container has about 10 liters of water, is lite about
17 hours a day, has crushed coral for calcium, and has a 4 inch bubble wand
in it.  I have 2 cultures of pure Daphnia magnum and a mixed culture of
Daphnia magnum and pulex.  The magnum get algae or sweet potatoes or the
yeast/infusoria liquor, depending on how I feel when they need food.  The
mixed culture gets the same plus floating lettuce.  

--John

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