sera Flore 4 Plant - NPK MacroPlant care product for plant aquariums with few animals Systemic care With NPK for main supply For aquarium plants 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