I have a pair of ~5" ClownKnifes. I got two so I could watch their behavior and patterning develop. I made arrangements with my lfs to bring one back whenever. I do NOT want to try to raise them together. I know some of you on MFK have had success with this, but I am not going to press my luck. I also only have one tank suitable for a CK. I am keeping an eye on them for signs of aggression but would like some tips from those with experience. What size/age do you recommend separating them?
When should CKs be separated?
- Thread starter lujor
- Start date
Half-Fish-Half-Amazing;4340003; said:
I have heard that CKs are sometimes OK in groups of 3 or more but never as a pair.
i kept CK and a royal CK together for some time no problem. just got to keep an eye on them and give them enough food.
lujor;4341040; said:
like ben said when u see aggression in the CK thats is when the time to sepereate them.
this is a video clip of a pair of RCK
http://www.youtube.com/watch?v=0OL8Y8YSamo
I've had a pair of CK's together that were each 25"+. Never had a problem with them showing aggression towards each other or any other CK I added or removed from the tank. When the lights went out though... anything that wasn't a ck or one of the aro's better hide... lol. Here's a pic.
WOW Super sized CK's! 
I too have 2 Cks's & a RK all together in a 315 Gallon, they show the occasional nip at each other but nothing more than that - Currently!
I too have 2 Cks's & a RK all together in a 315 Gallon, they show the occasional nip at each other but nothing more than that - Currently!
lujor;4341040; said:
I have two in my tank about 18" each...No problems with each other but they don't like the pacu..
..Monster fish rule,
Chris