General Hydroponics pH Down Liquid Fertilizer， 1-Gallon<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Acid formulation uses food grade Phosphoric acid</li><li>Add when your nutrient pH is too high in order to lower the pH to the proper level</li><li>Promotes pH stability</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41YuLB7iWkL.jpg" noproxy>