Thanks for the help.
I'm running a 90g with:
1 - 8" Oscar
1 - 7" Pleco
3 - ~5" Tinfoil Barbs
1 - ~3" Bala Shark
I know the Bala likes company but I was afraid two might be pushing it as these are all large fish. (I'd love a larger tank but getting the 90 required months of sucking up as it was)
My thought was that the Bala would hang with the Barbs and it does. They often school together.
My main concern was with the rate of growth of the Shark compared to the Oscar. At 3" the shark is too large for the Oscar now but may not be if the shark grows very slowly and the O does not.
Also, since you have been so kind as to ask the questions, will these fish when grown be too much for this tank? And do you think the Bala will be ok with only barbs to run (swim) with?
And - could this tank support another Bala?