Home >> Water Garden Information >> Aquatic Life
Koi, for example, need a larger pond than you might use for goldfish or for a simple pond without fish. A fish pond will probably have a biological filter in the recirculation system. It is possible to plan your fish, plants, and algae so that your pond can maintain a natural balance without the need for equipment.
Just like in the wilderness, plants and animals benefit from sharing a habitat. Fish waste provides nutrients that plants need while plants provide food and shelter for the fish.
Larger water features can accommodate more plants though they should not cover more than about 70% of the water's surface. There are a number of different kinds of plants you can choose. Submerged plants are good for keeping pond water clear. Floating plants help thwart the growth of excess algae by blocking sunlight and absorbing nutrients. Marginal plants are attractive and mesh the water garden with your landscape.
Popular fish and plant choices for water gardens:
Water lilies are quite popular in water gardens because they are attractive and have reliable habits. You can get either tropical or hardy water lilies. By choosing water lilies from each group, you can get a selection of plants that bloom both at day and in the night, spring through fall.
Koi are attractive and exotic fish. They require pond water at least 18 to 24 inches deep to give them enough room to swim, hide, and find shade.
Black Japanese snails are a good addition because instead of eating plants, they munch on algae, wasted fish food, and decaying vegetation.
Some wildlife you will find visiting free of charge. Water gardens tend to attract birds, frogs, dragonflies, and more depending on your climate.
Keep in mind, if your water garden has fish, you must detoxify their waste either with bacteria and plants or equipment. Waterfalls or fountains are good for fish because they add oxygen to the water. This way, you can have more fish than a small pond would typically support.
Source: All about Building Waterfalls, Pools, and Streams