hello, my name is Hayden ive had fish for a little over a year now and im thinking about moving up to some piranhas. i live in north Carolina so i will have some trouble getting them. i would like to get four red bellies but i cant really afford a tank over 75 gallons. so how many rbs can safely and comfortably put in a 75 gallon tank and if i need a bigger one where do i get it?