I just have been planning to add hoplo catfish to my stocking list for the pond that my orandas and other fancy goldfish are going into but I recently lost a beautiful and perfectly healthy comet goldfish after my golden channel catfish ( that I was told would not bother him) attacked and killed him; so I am cautious about getting catfish for the ponds, and feel I should ask around to get advice from people who already keep them to see if they would be safe to add ,and if they friendly and will coexist with my fancy goldfish peacefully, how would they fair in a koi pond?