I hope that you have a pond for them! They get a couple of feet long as adults.

That said, carp fish seem hard to breed. I only bred goldfish once; it was accidental. I had eggs in my 55g tank that had housed two fantails and a lionhead. Out of the maybe, 15 eggs that I was able to salvage, only three made it to fishy maturity. The try are TINY and any eggs that you do find, definately need to be seperated asap from the parents, or they're gone as lunch. I would look more into a specialty-goldfish-breeding site, as I can't even scratch the surface here.