Yeah I figure I've got a little bit of time before they get that big I'm planning on a much larger tank in the future so they'll be okay!Isabella said:Now, about Bala Sharks. Do you know that they grow up to 16" in size? A 30 gallon tank is way to small for them - they'd need something like at least 75 gallons. They're peaceful fish but they will soon grow too large for your 30 gallon tank. And if you keep two 16" long fish in a 30 gallon tank their entire lives, they'll only suffer there having no space to move around. But, this is my opinion, of course. You'll do what you think is best. However my advice is for your own good and for the fish's good.