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Re: Daphnia Hang-outs

Mostly, Daphnia seem to be attracted to light, so they are probably attracted 
to the window during the day and the room light reflections off the window at 
night. I put a tube light over my cultures and leave it on 24 hours a day. 
That way the daphnia congregate in a band across the tank, spreading them out 
a bit over a corner Hang-Out. When there is a lot of food in the water, 
daphnia congragate more. As the food particles thin out the daphnia spread 
out quite a bit, in very clear water almost completely.