Special phosphate nutrition for aquarium plants. Measure phosphate levels with the Flora Phospho test and add Phospho nutrition as needed. Colombo Nitro, Phospho and Ferro tests and nutrition have been developed especially for Aqua Scapers. Contents: 250 ml. Dosage: 1x pump (1.25 ml) per 25 litres of water increases phosphate levels by 0.1 mg/l.