I did not do enough research. I initially had 1 of those( in my show tank) and my wife liked it. So I got 2 more thinking they're peaceful. During quarantine the 2 new ones did not get along at all. Thinking things would be OK when I put all 3 together in the bigger show tank but no! 2 paired up( did not know they would pair up until now) and the remaining 1 gets harrassed. My question is: should I get him/her out? tank is 60 gal non-aggressive. Will it live in the bigger semi-aggressive tank?