you might want to check your attitude. YOU are the one who came here for help, YOU are the one who is an ameture, and YOU have no right to speak like that to any of us. i don't know where you got your information, but you are WRONG and you need to get over yourself. if you were acting like that to me in person, i would slap you right in the face. you are being a stupid little b*tch and you have no right to talk down to anyone here.
your koi and goldfish will get stunted in a 65g tank. it will be very difficult to keep the water clean with fish that large, and they will die prematurely. i don't think you understand what happens when i fish becomes stunted. their outsides stop growing, but their insides don't. eventually their intestines rupture. its a very greusom and cruel death. koi can easily live for 80 years and some have been recorded as living to 150+ years. besides that, they were never bred to be viewed from the side as in an aquarium. for centuries they have been selectively bred to be viewed from above, as in a pond.