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There is no need. Breeding usually only takes place in a very large tank. Oscars are substrate spawners and will lay from 200 to 2000 eggs at a time. After three or four days, the eggs hatch. The fry is then transported to other location in order to protect them from potential predators. Oscars tend and guard their young and known to be good parents.

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Q: Should you cover your tank for Oscar eggs to hatch?
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How long does it take for Oscar eggs to hatch?

I have had Oscar fish for 3 years now and my Oscars started to mate and my female Oscar is most definitely going to lay eggs. As far as I know, it takes the eggs 24-36 hours to hatch. It won't take any longer, so if your Oscar is roaming around in circles, she will start to lay her eggs. She won't all at the same time, she'll just lay a few, then the male will go over them and fertilize them and so on. Then they should hatch in the amount of time above. Good Luck Breeding Your baby Oscar fish. Sincerely, Terrier23

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