My pond currently has 2 Brown Bullhead catfish and a few Koi. I was wondering if it would be possible to buy a Sterlet, grow it in a tank and put it in my pond with the other fish. I dont see a reason not to, the bullheads and koi seem peaceful enough that they wont bother the sterlet. My pond is big enough to hold quite a few fish so it wont be a space problem. also, My pond is completely cycled and the water is crystal clear so the water conditions wont be a problem. The temp. in my pond usually dosent go above 70 degrees farenheight.