for the bass you are going to need a 200-300 gallon aquarium or pond for them, you can feed the oscar and bass the same food, you should try and get your bass on pellet or falke foods so you wont have to feed live foods only for the bass
I have a decent size koi pond(outdoor), and i have been told that bass can be kept with the koi, is this true? The koi are significantly larger than the bass and will always be bigger than it. Would it be okay if when the bass is older and larger to put it into my pond?
actually that would be great, since koi are very colorful carp, and they both like the same temps it would work out great, i know like i am pushing this on you but try to get your bass on pellets or what ever you feed your koi