so i just got a blue diamond piranha that is like 3inch a month or so ago and i put him in a 125g tank and im woundering if putting him in that big of a tank is a wast of tank for now tell he gets bigger?
i would not bother with a 10 gallon. i had mine in a 10 when i first got it, barely grew, within 2 weeks of moving it into a 75 gallon, it put on 2 inches.