Normally, cycling a pond...going through the ammonia, nitrite, nitrate cycle can take anywhere from 4 - 8 weeks. And, while people do, you should not add fish during this time. A lot of people do...to ponds and aquariums...but if the ammonia is more than 1ppm (part per million) their gills can become irreversibly damaged, and this weakens the their entire immune system. You can jump start it by adding a percentage of household ammonia upon setup, and then the nitrite and nitrate appear sooner. I am going to use Fritzyme, a liquid bacteria. It was supposed to arrive Friday, but it got caught up somewhere and will not arrive until Tuesday. Once I add that, the bacteria action will multiply faster, and since I only have 4 small comets to start with, I'll probably add them once the water hits 60-65 which is what their aquarium temperature is right now. The well water I pumped into the pond yesterday afternoon was so cold I could only keep my hands and arms in for a short time before they began to hurt. I expect to add my fish sometime next week. I have already added some plants.