Make a water garden in a container. Although you might have enough space to make a pond, ponds require time, energy, and lots of maintenance. On the other hand, if you love the idea of having a water element in your garden, container water gardens are easy to install and are especially great for small spaces like balconies, decks, and postage-stamp gardens. All you need is a watertight container, a few plants suited to the size of the container, and a soil mix heavy enough to secure the plants' roots so they won't bob to the surface. Of course, in any type of water garden, mosquitoes are guaranteed to come. You can deter these insects by installing a small fountain to agitate the water surface. If that's not an option, doughnut-shaped mosquito repellent (containing Bacillus thuringiensis) will kill the mosquito larvae. You'll need to replace the repellent when it eventually dissolves in the water.