I have decided to restock my 65 gallon (3ft long) aquarium with a school of rainbows. I have found both turquoise and neon rainbows available in my area. I am most attracted to the turquoise rainbows and would love to have a school of them, but was unsure if my tank is large enough. Do they usually grow to 4-5"? The turquoise are also half the cost of the neons. If I could do turquoise I would love to have a minimum of 4, but preferably 6. Do you think this could work?

If not, I will probably just go with the neons in a group of 6 to start. They are pricey in my area!