Java fern (Microsorum pteropus) is a popular aquatic plant for aquariums. It is a hardy plant that can tolerate a wide range of water conditions, making it a good choice for beginners. Java fern can be planted in the substrate or attached to driftwood or rocks. It prefers low to medium light and does not require CO2 injection. Java fern is a slow-growing plant, but it is relatively easy to care for. Here are some tips for caring for Java fern in your aquarium: Water conditions: Java fern prefers soft to medium-hard water with a pH of 6.0 to 7.5. The temperature should be between 72 and 78 degrees Fahrenheit. Lighting: Java fern prefers low to medium light. Avoid placing it in direct sunlight, as this can cause the leaves to burn. Substrate: Java fern can be planted in the substrate or attached to driftwood or rocks. If you are planting it in the substrate, use a fine-grained substrate such as sand or aquarium soil. Fertilizer: Java fern does not require CO2 injection or fertilizer. However, if you want to promote faster growth, you can add a liquid fertilizer to the water column. Trimming: Java fern can be trimmed as needed to remove dead or damaged leaves. To trim, simply use a sharp pair of scissors to cut the leaves at the base of the plant. Java fern is a beautiful and easy-to-care-for plant that can add a touch of greenery to your aquarium. With proper care, Java fern can thrive for many years.