My question is that of my topic. Is an albino channel cat compatible in a pond with two koi? The cat is about 14 inchs and is in a 125 gallon tank currently. I am looking to move him and am just curious so he doesnt kill the koi or beat up on them.
Unless the koi are large you may have problems, channel catfish grow big depending which one you have. There are some north american species which usually max out at about 14-16" depending on pond size, although there are some such as the blue channel catfish which get to 66" . There is also a catfish called the "White" catfish which is sometimes confused with channel cats, but this one only gets to 24" so not too bad for a pond!
The ultimate beasty catfish that is native to europe is probably the Wels catfish which grows to near to 200", thats nearly 5m!!! Although im sure you dont have one of those, no one would be stupid enough to sell them!