Primary care for plants: basic fertiliser for aquascaping aquariums Dosing is dependent on the intensity of the lighting, CO2 supply and consumption Healthy plant growth, prevents deficiency symptoms: with iron and a lot of other trace elements Add nitrogen, phosphorus, potassium and magnesium separately. Check with iron, potassium and magnesium tests Contents: 1 bottle ProScape Fe   Microelements. Use daily: 10 ml 100 l in high power light   CO2  3x weekly: 4 ml 100 l high power light no CO2  daily: 4 ml 100 in weak light conditions   CO2  weekly: 2 ml 100 l in weak light conditions no CO2