Aqua Bounce Concentrate 50ML Aqua Bounce Concentrate 50ML is an all-natural, water-based liquid concentrate designed for use in aquariums. It helps to keep your aquarium water clean, clear, and healthy. It helps to reduce the amount of nitrates and phosphates in your aquarium, which can cause unwanted algae growth and other water problems. Aqua Bounce Concentrate is easy to use and can be added directly to your aquarium water or mixed with other aquarium treatments. It is safe for use with all types of fish, plants, and invertebrates.