I swear some are so quick to pander overstocked this and overstocked that; its like a contest of sorts.
I say the fish aren't going to be 12" next month not even in 6 months, so assuming other conditions are met I agree with the frogman and say they are fine for now. Of course you should understand that eventually you will need a bigger tank or a plan to relocate the fish down the road when they get bigger.
As for those other conditions - in the mean time you should have plenty of filtration and make sure you regularly monitor the water conditions to insure good water quality.
I say the fish aren't going to be 12" next month not even in 6 months, so assuming other conditions are met I agree with the frogman and say they are fine for now. Of course you should understand that eventually you will need a bigger tank or a plan to relocate the fish down the road when they get bigger.
As for those other conditions - in the mean time you should have plenty of filtration and make sure you regularly monitor the water conditions to insure good water quality.