People aren't too polite to you, first of all if you wanna keep fish, shoot by all means get whatever you want. No ISH a 90g for a two inch RTC is more than enough, people say RTC will outgrow everyone's tank, But look at all these people with one. And damn sure not many people can house a RTC, or aro, but they still do. Not all RTC or Aro will hit 4FT. Everyone goes running their mouth, HEY LOOK THE WORLD RECORD GATOR GAR IS 10-13FT NO ONE KEEPS ONE CAUSE THEY'LL ALL GET THAT BIG! BS I've kept gars, SH, Rays, Aros in a 360. 8x3x2 and they all did fine. Anything with teeth is a risk to another fish, Shoot even my mosquito fish were aggressive as hell. So just ignore these people that went to school for smart ***es and do whatever you want, learn from it instead of hearing from it. Its like going to rehab for drugs and the counselors never seen what a crack pipe look like before,,