Transforming your backyard pond with koi and goldfish can create a vibrant, lively oasis. To ensure your fish thrive, start by testing your pond water for crucial parameters like pH, ammonia, and nitrites. If possible, quarantine new fish to protect your existing population from diseases. Gradually acclimate the new fish to the pond’s temperature to avoid shock, and give them time to adjust to their new environment. Finally, use water conditioners to reduce stress and support their health. With these simple steps, you’re on your way to creating a happy, healthy home for your fish.