{"product_id":"general-hydroponics-ph-down-liquid-phosphoric-acid-1-quart","title":"General Hydroponics pH Down Liquid - Phosphoric Acid pH Adjuster for Hydroponic Nutrient Solutions - 1 Quart and 1 Gallon - Pickup in Store Only","description":"\u003cp\u003eGeneral Hydroponics pH Down is a liquid acid pH adjuster formulated with food-grade phosphoric acid to lower the pH of hydroponic nutrient solutions and irrigation water. The premium-buffered formula gives stable, predictable pH control; add a little at a time until you reach your target. Ideal for any GH nutrient program that targets pH 5.5-6.5.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFood-grade phosphoric acid formulation lowers nutrient solution pH\u003c\/li\u003e\n\u003cli\u003ePremium buffering for pH stability\u003c\/li\u003e\n\u003cli\u003eReliable pH control for hydroponic and liquid-feed systems\u003c\/li\u003e\n\u003cli\u003eWorks alongside GH nutrient programs targeting pH 5.5-6.5\u003c\/li\u003e\n\u003cli\u003eUseful with high-alkalinity water or pH-unstable media such as rockwool and gravel\u003c\/li\u003e\n\u003cli\u003eCorrosive acid: wear eye and skin protection; keep out of reach of children\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eHow to Use\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMix nutrients into fresh water first, then add pH Down a little at a time. Stir, re-test, and repeat until the target pH is reached (recommended pH for most crops is 5.5-6.5). Do not pH-adjust concentrates. Use a pH test indicator or a calibrated meter to verify. The amount needed varies with water quality, reservoir volume and nutrient recipe. Store upright, tightly sealed, in a cool dry place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProduct Details\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposition:\u003c\/strong\u003e phosphoric acid, about 15% by weight (per the manufacturer's safety data sheet)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 1 quart (946 mL)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade by:\u003c\/strong\u003e General Hydroponics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety:\u003c\/strong\u003e corrosive acid; wear eye and skin protection and keep out of reach of children\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp class=\"sku-info\"\u003e\u003cstrong\u003eModel # \/ SKU:\u003c\/strong\u003e HGC722120\u003c\/p\u003e","brand":"General Hydroponics","offers":[{"title":"1 Quart","offer_id":47513077940415,"sku":"HGC722120","price":7.95,"currency_code":"USD","in_stock":true},{"title":"1 Gallon","offer_id":67647282249919,"sku":"722125","price":30.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/9334\/4191\/files\/gh-9597620814015-800.jpg?v=1791162807","url":"https:\/\/www.dsgardensupplies.com\/products\/general-hydroponics-ph-down-liquid-phosphoric-acid-1-quart","provider":"DS Garden Supplies","version":"1.0","type":"link"}