While not all algae is a bad thing, controlling unsightly algae growth on your pond liner involves careful maintenance and environmental management. Since stagnant water creates a favorable environment for algae, make sure your water is circulating well and water is moving even in crowded or narrow corners. An underwater pump is effective at discouraging algae proliferation and also helps maintain consistent temperatures, pH levels, and circulates beneficial bacteria throughout the pond. If desired, a fountain, waterfall, or similar feature can help improve water movement and oxygen levels.
Maintaining a balanced ecosystem with appropriate fish and aquatic plants will help make your pond less welcoming to excessive algae growth. Certain fish species, like koi and goldfish, will eat algae attached to pond walls, while aquatic plants will absorb excess nutrients that fuel algae growth. During warm weather, consider limiting sunlight exposure by shading the pond with floating plants or strategically placed structures to reduce algae growth. Regularly cleaning the pond by removing debris and organic matter prevents the buildup of nutrients that contribute to algae formation.
