Neo Plants Tab series consists of 4 types TAB 1, K, Fe, ST.longIt is based on the best materials and technology.It can be used according to the nutritional status of aquatic plants. #PotassiumDeficiencyWhen an old leaf has a pin hole . Lack of photosynthesisuse : Tab K Aquari Neo Root Tabs K PotassiumK Ingredient Potassium(chemical fertilizer) Effect Promote photosynthesis When to use Hole in old leaf