Hey everyone I've had clown knives before and I've owned several other monster fish not something that is odd and has me worried is I just added a Jardini arowana ( 4-5 inches ) to my 220 gallon tank with my Golden clown knife ( 10 inches ) and I noticed today my clown knife was being overly aggressive and chasing the arowana around besides a common pleco ( 4 inches ) they are the only 2 in the tank. Now the clown knife has been alone in the tank for a few months now so I assumed it may be territorial issues so I did something any other person may do with those type of issues I moved everything around and redesigned the tank to make it seem like he's in a new tank so he can't really have a " territory " anymore until he finds a new one any other suggestions? I am very concerned especially since owning a Jardini is a once in a life time opportunity where I live I don't want my golden clown knife to kill my Jardini if things get really bad I have a 150 gallon I can temporarily move one of them to but I rather not please help!