If you are thinking about a diy container water garden option, you should know that you do not need many things since what you need is only water and a pot. The small pot that have water do not require too much of care, the only thing you need is to add water after sometime. You can look for containers and plants you like to customize the water garden for outdoor space. You may use any type of water container to make water garden, however the pots of dark interior give an impression of great depth, it makes the algae to be less obvious and it does not encourage the growth of the algae. You can use overturned containers or bricks that have been submerged into the surface of the water since they allow different heights for the plants.