Tortuc in his discussion with Ben Ravencraft and SofD sum up everything I've been saying:
Tortuc
oscars growth depend on what you feed them and the size of the aquarium. the larger the aquarium the faster they'll grow also the more you feed them the faster they'll grow. don't starve them trying to slow their growth because they will get large anyway the rate a which they get large is all that can be control. by them medium sized not babies alaos be careful because they always act like they're hungry they won't stop eatting so control how much you feed them
they are very intelligent fish
Torry
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SystemOfADown
I was thinking about just getting 3 babby Oscars that are only about 2-3 inches long for my 20 gal. long Cichlid tank. How long would it be before I would have to get them to a larger tank. I would feed them twice a day, once with Cichlid Pellets, then second with freeze dried blood worms until they got a little older.
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SystemOfADown
Any Help?
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Ben Ravencraft:
"3 baby Oscars will need more room really soon. The size of the surroudings will not affect the growth rate of any animal, even fish, thats all a myth. Growth rate is an inherent genetic code that wont be changed by anything. If anything a tank too small will be bad for a fish in the long run even if you think you're able to "get away with it for the time being". Think of a 55 gallon tank as the smallest size for a single oscar to be happy. Alot of people may try to argue with this, but if you plan on keeping three oscars get them young, and keep them in a really big tank. If I were you, Id try a single oscar to get some more experience. Buy it small with an equally small plex. You can start them off in a 20 gal for the time being, but expect to house them in a 55 gal in a year or so. Also make sure your filtration is good, because oscars are messy eaters. Ive successfully kept them, and they are a joy to have, just try making your first experience with them simple, dont jump into trying three because just one alone is challenging enough. But keep this in mind, each individual finds their own method is successful, try it for yourself (stick to the basics), and go from there. Let us know how it goes, they're one of my favorite fish, and unfortunatley they're also some of the most misunderstood fish."
Found here:
http/forums.fishindex.com/archive/index.php/t-479.html