"Aquario Neo Plants St.Long Features Ingredient Organic fertilizer Effect Long lasting and slow release fertilizer When to use Calcium deficiency: The growth of new leaves are abnormal, when new leaves twist. Old and mature tanks: Tanks over 1 years old or inert substrate, such as gravel or sand. Deep and heavy rooted plants: Such as Cryptocoryne or Echinodorus species Why Aquario Neo Plants Tab? 1. Latest fertilizer manufacturing technology. The rate of absorption of fertilizer is high and nutrients are slowly released, preventing the occurrence of algae. 2. Manufacture with optimum strength. Manufactured with a strength that is slowly released to allow complete absorption 3. Use high quality materials. 4. There is little impact on the bottom. Aquario Neo Plants Tab Series consists of 4 types TAB 1, K, Fe, ST.Long. They are based on the best materials and technology and can be used according to the nutritional status of aquatic plants."