Check the listing for details. SEACHEM FLOURISH PHOSPHOROUS AQUARIUM PLANT SUPPLEMENT. Condition: New. Listed at 11.99 USD. SEACHEM FLOURISH PHOSPHORUS Auction is for ( 1 ) : SEACHEM FLOURISH PHOSPHOROUS Flourish Phosphorus™Phosphorus supplement for the planted aquariumA safe 4500 mg/L solution of potassium phosphateTakes the guesswork out of phosphate dosing OverviewPhosphorus is one of the main three macro nutrients (nitrogen, phosphorous, potassium: NPK) required by plants and can often become the limiting factor to growth in a flourishing system. Flourish Phosphorus™ is a safe solution (4,500 mg/L phosphate) of potassium phosphate that takes the guess work out of phosphate dosing. Unlike competing products that mix nitrate and phosphate in a fixed ratio, Flourish Phosphorus™ (being nitrate free) allows you to dose phosphorus according to the needs of your plants without the risk of overdosing nitrates. When used as directed, Flourish Phosphorus™will enhance and accelerate the growth of aquatic plants without enhancing algae growth. For maximum benefit, use with Flourish Nitrogen™ and Flourish Potassium™. Flourish Phosphorus™ is safe for invertebrates such as shrimp. Please feel free to contact me for International and combined auction shipping rates or with any questions or concerns that you may have about my products. Thank you !