For many gardeners, cultivating a fish pond is the height of accomplishment. Adding the soothing element of water and colorful fish brings a new dimension to your outdoor living space, just as an aquarium does indoors. Koi fish or goldfish in a garden pond capture and fascinate the interest of people of every age. Watching small fish grow into larger fish - their growth being relative to the size of the pond - and enjoying the frenzy and excitement of feeding times, is always a delight.