Re: [Killietalk] Recycling Daphnia water

["Rusty Scalf" <rscalf at jps_net>]

I had a two thriving Daphnia pulex cultures in large rubbermaid containers 
(~50 gallon)  going through the fall. Eventually productivity began to drop. 
One culture crashed entirely, the second just limped along with a tiny 
Daphnia population. I sent an email to The Bug Farm in San Rafael, CA, my 
source for these. Their response was that water changes keep Daphnia 
cultures healthy.  When they remove Daphnia for use or sale, they remove 
water with them (though a pipe at the bottom) and then replace that water. 
I was removing Daphnia with a net.

Based this experience, and advice, I should think that recycling Daphnia 
culture water makes no more sense than recycling fish tank water.

New water brings in new minerals.

I must add that I use baby food supplement periodically, so the Daphnia are 
not just green water dependant.

Use that water as a nitrate source for you garden!  That's recycling of a 
type.

        Rusty





----- Original Message ----- 
From: "George Slusarczuk" <yurko at warwick_net>
To: <overall077 at lycos_com>; "killifish discussion list" <killietalk at aka_org>
Sent: Sunday, January 23, 2005 12:49 PM
Subject: Re: [Killietalk] Recycling Daphnia water


Hello Loraine,

Moina neonates are about 300 micron -- way larger than your 50Î screen.

Unless you are saving water, why would you want to do that? Isn't it
easier to just add a bit of fertilizer to replacement water?

In the Moina culture water smaller rotifers could be present. Some
rotifer neonates COULD pass the 50Î screen. They will rapidly ruin your
green water culture.

Best,

George




On Jan 23, 2005, at 2:33 PM, Lorraine wrote:

> Has anyone tried recycling the daphnia water back to the green  water
> culture.
>
> I am using a 50 micron filter to suck the water out of the daphnia tanks.
>
> I am not sure how small a newly born moina baby is,  but if it is larger
> than 50 microns then would this be possible? I realize that the last thing
> we need is daphnia in the green water culture.
>
> Just a thought
>
>
>
> Lorraine
>
> Knee deep in mud in sunny Colorado.
>
> http://lorraines-killies.com
>
>
>
>
> To join the AKA see http://www.aka.org/pages/join.html
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