The aggressor calmed down, thank God. I think all other neons are too big for him now. Hope he doesn't "snap" again. Thanks, guys. And I moved few plants like you suggested me to and it helped.Once they taste flesh it's over. I had one that used to attack my arm, never hit the same spot twice, testing it for weaknesses. Used to do the same thing to the acrylic if I made eye contact with him for too long. What you have is a blood thirsty animal from the nature, all boxed up and asked politely not to kill, it's done. Sorry.