Comminty Tank aggression! HELP!?

OVERCROWDED!!!! You need at least 6 tetra. common mistake among beginners. If they arent in a school they will be aggressive and stressed. your fry will not be crushed thats rediculous. 68 degrees is not warm enough. 72 is the minimum. 75-76 is perfect. think before you buy me friend. you cant be an impulse buyer with life.