The main nutrients nitrogen, phosphorus and potassium are very important for the healthy growth of aquatic plants. While these substances are sufficiently available in aquariums with many fish via their waste and uneaten food, there is often an insufficient supply of macro nutrients in plant tanks with few or no animals. Poor plant growth is the result. sera flore 4 plant was developed for supplying the aquatic plants in aquascapes and Dutch style aquariums with nitrogen, phosphorus and potassium in an optimal ratio - for healthy and strongly growing plants. sera flore 4 plant is well tolerated by all invertebrates.sera flore 4 plant+ systemci care for aquascaping or holland tanks+ with NPK for main supply+ for tanks with few or without animals+ well tolerated by all invertebratesDosage sera flore 4 plantAdd daily 1 to 5 ml on 20 litres of aqaurium water, depending on the number of water plants.Nutient content 100 ml:Nitrogen (N): 228 mgNitrate (NO3): 935 mgPotassium (K): 600 mgPhospha