{"product_id":"growth-technology-ph-down-30","title":"Growth Technology pH Down 30% Phosphoric Acid Adjuster","description":"\u003ch2\u003eThe everyday strength pH adjuster, not the professional concentrate\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eGrowth Technology pH Down 30%\u003c\/strong\u003e is a \u003cstrong\u003ephosphoric acid\u003c\/strong\u003e pH adjuster at the strength most home growers actually want. The 81% professional concentrate is efficient but unforgiving in a small reservoir, where a few drops can overshoot by a full point.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eControllable in a small tank\u003c\/strong\u003e - 30% strength means you can actually hit a target rather than bracket it\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhosphoric acid\u003c\/strong\u003e - contributes phosphorus rather than an ion the plant has no use for\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable once mixed\u003c\/strong\u003e - holds a set pH better than citric acid, which biology breaks down\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with any feed\u003c\/strong\u003e - mineral or organic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafer to handle\u003c\/strong\u003e - far less aggressive than the 81% professional grade\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOvershooting pH in a small reservoir\u003c\/h3\u003e\u003cp\u003eA strong concentrate in a domestic-sized tank is almost impossible to dose accurately - a squeeze too much and the pH crashes, then it gets corrected back with pH Up and the reservoir ends up loaded with salts that were never meant to be there. A weaker acid removes the problem.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjusting:\u003c\/strong\u003e add in small amounts, stir thoroughly, then wait a minute before reading again\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder:\u003c\/strong\u003e always adjust pH \u003cstrong\u003eafter\u003c\/strong\u003e the nutrients are in, never before\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydroponics:\u003c\/strong\u003e target \u003cstrong\u003e5.5 to 6.2\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil and coco:\u003c\/strong\u003e target \u003cstrong\u003e6.0 to 6.5\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandling:\u003c\/strong\u003e wear eye protection and add acid to water, never water to acid\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive:\u003c\/strong\u003e Phosphoric acid, 30%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRole:\u003c\/strong\u003e pH adjustment downwards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest for:\u003c\/strong\u003e Home and small commercial reservoirs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternative:\u003c\/strong\u003e 81% professional grade for large tanks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandling:\u003c\/strong\u003e Eye protection; add acid to water\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Growth Technology","offers":[{"title":"1L","offer_id":53496874762506,"sku":"HCS-B2-018-01","price":10.45,"currency_code":"GBP","in_stock":true},{"title":"5L","offer_id":53496874795274,"sku":"HCS-B2-018-02","price":39.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/GrowthTechnologypHDown30_0049be41-1d0e-46d1-81fa-0b5dd536f1ec.png?v=1786226533","url":"https:\/\/hydrocropshop.co.uk\/products\/growth-technology-ph-down-30","provider":"Hydro Crop Shop","version":"1.0","type":"link"}