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Old 04-30-2012, 11:42 AM   #1 (permalink)
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Default Glo fish pregnant?

I have 5 glo fish in my 55g and have noticed one is way bigger than the rest, belly mostly. I'm pretty sure she is pregnant but not sure what to do. I have a breeders net to hang on the side of the tank, but when will she lay the eggs and how long until they are fertilized?
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Old 04-30-2012, 03:22 PM   #2 (permalink)
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Default Re: Glo fish pregnant?

She isn't pregnant in the true sense of the word, but is carrying eggs. Glo-fish are a petrie dish, genetically modified animal that is copyrighted, so please ignore any advice on how to breed her.
If you had an normal, non-copyright zebra, you would put her in a ten gallon with two or three males and very shallow water. Aerate like crazy, and then suddenly drop the temperature 2-3 degrees with a rush of cooler water. They go crazy and lay eggs and the female is then saved from egg binding.
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Old 04-30-2012, 05:53 PM   #3 (permalink)
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Default Re: Glo fish pregnant?

So are you saying once she lays the eggs they won't hatch?
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Old 04-30-2012, 05:59 PM   #4 (permalink)
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Default Re: Glo fish pregnant?

It's not that they can't hatch, it's that it's against the copyright laws to breed them. The fish are not sterile and are perfectly capable of breeding.
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Old 04-30-2012, 06:02 PM   #5 (permalink)
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Default Re: Glo fish pregnant?

If you have 2 or 3 males to participate in the spawning chase (they need room to run) a danio female will lay lots of good eggs. They will also eat good eggs. She won't just drop the eggs. She has to spawn to lose them.
Glo-fish are reputed to have low fertility. I don't keep any GMO fish, so I don't have direct exxperience, but I have bred danios of several natural species. They are easy to raise.
But it can't be done in a breeder trap. Ideally, you need a long low tank with marbles on the bottom to stop egg eating (the eggs fall through)nd hatch in about 48 hours, if I remember correctly.
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Old 04-30-2012, 06:40 PM   #6 (permalink)
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Default Re: Glo fish pregnant?

Ok that's very helpful. I have a 10g tank I may set up and put a few of them in it. And just put the babies in my daughters 10g tank if they hatch. How many do danios usually have?
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Old 04-30-2012, 10:14 PM   #7 (permalink)
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Default Re: Glo fish pregnant?

Thousands. But if all goes well, you can raise a dozen or two. Not that you would raise glofish - I know you are plannning on non-GMO, non copyright Danios....

I'd get a good aquarium book or use a more specialized site- danios are extremely important in genetics research (hence the glo-fish) and there are a lot of online articles on them.
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