Tetra PlantPro is a weekly full aquarium plant fertilizer. Tetra PlantaPro specifically adds quickly consumed trace elements and vitamins in a form ready accessible for plants.this is how Tetra PlantPro works:+ For a healthy and lush plant growth+ Promotes beautiful green leaves+ Prevents deficiencies of vital substances+ Vigorous plant growth is the best algae prevention+ For the absorption of nutrients through the leaves+ No water pollution as free of phosphate and nitrate+ For all freshwater aquariums+ Dosage: add 2.5ml per 20 litres of aquarium water every week.