The Channel cats wont hurt anything, dont get blue channels. If your gonna feed the pond they shouldnt bother anything till they get bigger, and by then you or someone would be takin some to eat. Just my observations on channels in the pond. Just dont put to many 3/4a pond 30 - 50 CC wont hurt nothing. Plus if there true channels they will eat some weeds and other green stuff.. everyone i cleaned had greenery in its belly and no fish. Now Blue channels whole differnt animal, they will wipe out your fish. Someplace on her there is a ID just dont remember where. After you know the differnce you can tell by looking at the mouth, but there is other ways like counting fin lines and another give away is a true channel has black spots on it when little. all the other stocking advice is all good and will drive you nuts but in a fun way.. G/L