When it comes to fertilizing Anubias, the best approach is to use a balanced fertilizer that contains both macro and micro nutrients. This will ensure that your plant has access to all of the elements it needs for optimum growth and health. A good option is an aquatic-specific slow release fertilizer such as Seachem Flourish Comprehensive Supplement or Tetra Flora Pride Plant Food which are specifically formulated for aquarium plants like Anubias. These fertilizers provide a range of essential macronutrients including nitrogen, phosphorus, potassium and trace elements; plus micronutrients such as iron, zinc, manganese and copper. The slow release nature of these products means you don’t have to worry about overdoing it with fertilization – just follow the directions on the packaging for proper dosage levels based on tank size/type etc., and apply according to schedule (usually weekly). Another advantage of using this type of product is that there’s no risk of damaging water chemistry either because they don't contain any harmful ingredients or pollutants like some other types can do if applied in too great a quantity. So if you want healthy Anubias with lush green leaves then be sure to invest in quality liquid or tablet-based fertilizer!