Dennerle Plant Care K is a Potassium fertilizer for demanding plant aquariums with low or no fish stocking.Dennerle Plant Care K+ Potassium fertilizer for heavily planted aquariums+ for targeted supply of potassium+ for splendid plants and intensively shining colors+ high coverage due to concentrated active ingredients+ scientifically tested and optimizedDosage & Application Dennerle Plant Care K:Dosage as needed 1 ml per 100 l of aquarium water. This dosage increases the water values as follows:Potassium K: 1 mg/l