What other kinds of fish can Koi coexist in a pond with? I'd like to have a setup with them and a couple of other types. I was thinking Yellow Perch and Brown Bullhead might be nice alongside them? Do you guys think the Koi would make the water too dirty to have together with Yellow perch or outcompete them or anything, I've always heard perch like pretty clear water but no idea how dependent they are on it? I've heard koi are fairly docile but maybe other factors to consider? Like to hear some thoughts?