I have an 18" Lei that been acting up. I have him in a 240 gal and recently he been acting up and constantly trying to jump. Luckily my lid are heavy with a brick on top incase he tries to jump out. Anyone know how to calm him down? I lowered the water 7-8 inch so that he wouldn't injure himself if he jumps. The only tank mate is a handsize KKP. Any suggestion would be great. Water been the same with 30% weekly water change nothing really change. Tested parameter and its all there with nothing out of range. Tank is filtered by two fx5.