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Old 07-30-2018, 05:05 AM   #1 (permalink)
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Default Live Daphnia from frozen Daphnia?

I heard somebody on youtube saying you can get live daphnia from the frozen daphnia cubes you feed your fish. I guess the thinking is some daphnia eggs might be in with the daphnia and those can survive being frozen.
Well I'm testing that theory out. You can't beat 'free' daphnia.

Has anybody done this?
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Old 07-30-2018, 05:30 AM   #2 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

I've never tried that, but if they were in ephippia-making mode when they were frozen, it's certainly possible. They make ephippia at the end of their growing season or when overcrowded, such as when a vernal pool is shrinking.
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Old 07-31-2018, 09:58 AM   #3 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

I read eggs don't hatch till 5 days to 2 weeks. It's a long wait.
There are 1 to multiple eggs in an ephippia depending on the species. Sometimes the eggs are duds too.
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Old 07-31-2018, 02:20 PM   #4 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

Go find a good floodplain pool without fish, if you want free daphnia.
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Old 07-31-2018, 03:13 PM   #5 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

None around me that has daphnia that I know of. I'll end up buying some off aquabid. I'm curious about this more than anything.
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Old 08-01-2018, 05:40 AM   #6 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

Speaking of vernal pools, I'm surprised raising freshwater fairy shrimps isn't more common. I wonder if there are species that don't require a dormant stage and reproduce in good conditions.
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Old 08-01-2018, 02:28 PM   #7 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

I bought daphnia eggs for fun. Shipping eggs is a lot easier than live. I hear hatching them in distilled water first is the way to go.
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Old 08-01-2018, 07:23 PM   #8 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

Fairy shrimp can reproduce both ways: live-born young and resting eggs, similar to brine shrimp and daphnia. But its tricky to keep a culture going long-term; they usually crash eventually and you need to restart by drying and re-wetting the sediment, and hoping there's some good eggs in it.
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Old 08-05-2018, 08:56 AM   #9 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

It had been 6 days since I put in frozen daphnia. No babies appeared. Now we know.

I'm hatching new daphnia eggs right now instead. They should hatch in 3 days. I'm using florescent light instead of the recommended sun.
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Old 08-07-2018, 09:34 AM   #10 (permalink)
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Default Re: Live Daphnia from frozen Daphnia?

It has been 2 days and I saw the first daphnia. I guess I should start feeding but in very small amounts. I'm planning to feed yeast and spirulina powder.
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