How to Plant Aquatic Plantsbr The WITTY Guide to Plant Aquatic Plants, br Aquatic plants do more than just make a water feature more attractive. They also remove nitrogen and phosphorous from the water which are produced by fish absorb carbon dioxide and produce oxygen. 1 X Research source This makes the environment healthier for the fish and reduces algae as algae requires the same nutrients as larger aquatic plants. When they are planted correctly and get enough light aquatic plants will grow quickly with healthy foliage and if the plants bloom they will usually bloom the first year aftebr Grow tropical and subtropical water plants like Cannas Canna spp in a container. These plants grow well in USDA Hardiness Zones 7 to 10. But they will not surbr Do not use a container with drain holes.