There is actually three "creeks" that feed this pond one comes from a pond about a mile away another is a creek that runs from miles away and the other comes out of the ground on the property. I'm positive we will get fish we do not want in there but we will just do everything we can to reduce the population of them.The only one that we could actually stop things from entering would be the one from the spring which is where we plan on making the forage brood pond.