"Flourish? is a comprehensive plant supplement for the natural freshwater
aquarium. It contains a rich assortment of important micro elements,
trace elements and other nutrients. These include calcium, magnesium,
iron and other important elements that have been shown to be
beneficial to aquatic plants. For macro element (NPK) fertilization, use
Flourish? Nitrogen?, Flourish? Phosphorus? or Flourish? Potassium?
as needed. Flourish? is safe for invertebrates such as shrimp."