Seachem Flourish Potassium 20L (5.3 gal.) contains 40,000 mg/L of potassium suitable for the natural freshwater aquarium(5.3 gal.) contains 40,000 mg/L of potassium suitable for the natural freshwater aquarium. Potassium is one of the vital elements essential to sustain a vigorous level of plant growth. Potassium can be depleted in a rapidly growing aquarium or when a source water has a low mineral content. In these cases potassium can become the limiting factor to growth. Use FLourish Potassium to prevent potassium depletion and to maintain the highest level of growth. A 100 ml bottle treats 80L (20 gallons) for 4-6 months. This item is a special order item that is drop shipped direct from Seachem

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