In case your aquarium plant has a very small amount of algae on its leaves then you can simply brush or gently rub the plant in the aquarium to remove algae. In case your aquarium plant has a lot of algae growth on its leaves then you take out the plants from the substrate. And rub it with your hands and then put it back inside your aquarium. In the case of extreme algae growth, you can soak the plants in a mild bleach solution to remove algae.