I'm not a big fan of mixing Knives, but the fact that CKs do not have electrical sensors like BGKs can make them okay. Just be aware that the CKs grow a lot quicker than BGKs. And CKs don't discriminate what can fit in their mouths.
my Ck does not tolerate electric fish, i tried an elephantnose more than half its length and it grabbed it by the neck and ripped chunks out, by the time i noticed it was too late, but its was fine with a 3 inch butterflyfish when it was 12" long.
my Ck does not tolerate electric fish, i tried an elephantnose more than half its length and it grabbed it by the neck and ripped chunks out, by the time i noticed it was too late, but its was fine with a 3 inch butterflyfish when it was 12" long.