How do i breed zebrs danios?

I got 6 of them in a 75 gallon tank.
Answers:
Zebra danios are stimualated by the morning sun and a raise in temperature when it rises. I'm serious. So if you don't have the tank next to a window pointing to the direct east, its impossible. Here's a link:

http://freshaquarium.about.com/cs/cyprin...

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They are morning spawners as already mentioned. You should be sure you have both sexes in your group (mature males will have yellow between the stripes) and separate them for a while before putting them back together (if you don't have a spare tank, use a divider).

You might want to move them into a smaller tank for the actual spawning - use marbles on the bottom to keep the fish from eating the eggs after they spawn. After the eggs are laid, remove the parents.

Before trying to spawn, prepare an infusoria culture (directions in link below), you have food for the fry.

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You put a male and a female in a tank with marbles on the bottom, only one layer. After they lay the eggs, take them out. When the fry hatch, feed them until they are big enough to go into the regular tank. You can keep some of them in the "hatchery" to prevent overcrowding in the regular tank.