hi , i am getting 2 baby oscars from some one at very good price, but the problem is that i dont have another tank ready right now , can i house them in my existing tank in which i have few goldfishes and carps for few weeks till my another taknk is ready . the babies are about 2 inches in size adn my tank is 2.5 feet long . main concerne is that will the babies or my existing fish may harm each other???

more thank likely the goldfish will become food. If they dont then theyll be in horrible conditions, which may kill them....especially if its for a few weeks..

i agree with dwencl either gold fish will get bullied
or oscar will get sick due to gold fish and carp are very messy dirty
fish and could be carrying some bactieria or diseaes that may harm the oscars
but thts my opinion yu will have to wait untill someone with more knowlage chimes in =]

for how long???? i had done it before and the oscars were fin for two months
but grows slowly due to tank size....

As long as the goldfish dont fit in the oscars mouth they wont end up as food, but the goldies may end up being bullied. If that happens you could always split them up with a divider

Yeah should be fine together and goldfish are very hardy fish...as long as your goldfish are as big or bigger than the Oscars

Only for 2 months max I would say...if you think about the fact the Oscars have the potential to grow 2 inches in that time.

Do you have a heater in your goldfish tank?