do you think a koi will be good ina
"above pond"or other words out of the ground pond
about 300 gal? with a couple of goldfish i don't
think i have room in my house for winter


do you think i can keep them in the pond with
a pond heater for the winter?

Koi are jumpers - make sure they can't jump out of what ever you put them in. How big is your Koi? I have a 500 gallon inground pond with 3 Koi but they are all small - 6 inches, 3 inches and 2 inches and several other fish.

IM planing on getting some .....

I brought all my Koi inside this winter. They are in my basement in rubbermaid feeding troughs. As long as you make it so they don't jump out they should be fine in the tub.

What can i do? so that they don't jump out?

You can put lots of stuff over it - chicken wire, cloth netting, I think someone mentioned floating styrofoam around the edges (not sure how that works).

I have lot's of floating plants do you think that whould work?