Your water garden is going to be home to many different plants, fish, and tiny creatures that you might not even realize are there. Your water garden is going to revolve all around the water and caring for the water quality, the clarity of the water is important for the life long gardening in the water garden. Algae in the water garden can hurt your plants or fish, depending on the extent of that it is growing.
Your plants are going to be an important function in cleaning the water and controlling the amount of algae that is growing in the water garden. If you are starting a water garden with out plants at all your water is going to turn cloudy, dark and green with the build up of algae in the water.