{"product_id":"gold-label-ultra-ph","title":"Gold Label Ultra pH- – pH Down for Hydroponics","description":"\u003ch2\u003eA three-acid pH down that keeps your feed in balance\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eGold Label Ultra pH-\u003c\/strong\u003e is a professional \u003cstrong\u003epH down\u003c\/strong\u003e from Gold Label in Holland for lowering the pH of \u003cstrong\u003enutrient solution\u003c\/strong\u003e in hydroponics, coco and soil feeding. Instead of relying on one acid it blends \u003cstrong\u003ephosphoric, nitric and sulphuric acid\u003c\/strong\u003e, so each correction adds a small, even amount of \u003cstrong\u003ephosphorus, nitrogen and sulphur\u003c\/strong\u003e rather than loading the tank with a single element. Gold Label formulate it for use right through the \u003cstrong\u003egrowing and flowering\u003c\/strong\u003e cycle without causing toxicities.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree acids in balance\u003c\/strong\u003e – phosphoric, nitric and sulphuric acid break down to phosphorus, nitrogen and sulphur, keeping your nutrient profile even.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafe through the whole cycle\u003c\/strong\u003e – made to be used from vegetative growth to the end of flowering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for hard water\u003c\/strong\u003e – less of the phosphorus and calcium build-up that concentrated phosphoric-only pH down can leave behind.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise control\u003c\/strong\u003e – add it in small doses and creep up on the exact pH you want.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with any base feed\u003c\/strong\u003e – a universal acid for adjusting nutrient solution in any system or medium.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy pH Drift Stops Nutrient Uptake\u003c\/h3\u003e\u003cp\u003eHard tap water carries alkalinity that pushes solution pH upwards, and in a recirculating system the pH usually creeps up between top-ups as plants draw on the feed. Once it climbs out of range, iron, manganese and phosphorus become harder for roots to take up, and plants show it as pale new growth, slow growth and poor nutrient uptake even when the feed itself is right. Bringing the tank back into range puts those nutrients within reach again. In hard-water areas a phosphoric-only pH down can react with the calcium in the water and leave deposits; Ultra pH-'s three-acid blend reduces that build-up.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShake well\u003c\/strong\u003e and open the container with care.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMix your base nutrients and additives first\u003c\/strong\u003e, then measure pH with a calibrated meter.\u003c\/li\u003e\n\u003cli\u003eAdd Ultra pH- in \u003cstrong\u003esmall doses\u003c\/strong\u003e, stir and re-test until you reach your target – typically around \u003cstrong\u003epH 5.5–6.2\u003c\/strong\u003e in hydro and coco and \u003cstrong\u003e6.0–6.8\u003c\/strong\u003e in soil, or as your base nutrient advises.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlways add acid to water\u003c\/strong\u003e, never water to acid, and avoid splashing – wear gloves and eye protection.\u003c\/li\u003e\n\u003cli\u003eStore at \u003cstrong\u003e5–30°C\u003c\/strong\u003e, away from frost and direct light, in the original container and out of reach of children.\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\u003eType:\u003c\/strong\u003e pH down (acid) for nutrient solutions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eActive ingredients:\u003c\/strong\u003e phosphoric acid, nitric acid and sulphuric acid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNutrients contributed:\u003c\/strong\u003e phosphorus, nitrogen and sulphur\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e hydroponics, coco and soil – any system or medium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStage:\u003c\/strong\u003e growing and flowering – the whole cycle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose:\u003c\/strong\u003e add in small amounts until the target pH is reached\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e 5–30°C, frost-free, out of direct light, in the original container\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e Holland\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eHow much Ultra pH- will I need?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThere is no fixed rate – it depends on how alkaline your water is and on the base feed. Gold Label advise adding it in small doses and re-measuring until the solution reaches the pH you want; hard tap water needs more than soft or RO water.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhy a blend of three acids rather than phosphoric acid alone?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eEach acid adds a little of a different nutrient – phosphorus, nitrogen and sulphur – so repeated corrections do not skew your feed towards one element. In hard water it also cuts the phosphorus and calcium build-up that phosphoric-only products can cause.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eCan I use it with other brands of nutrient?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eYes. It is a universal acid for adjusting nutrient solution, so it works with any base feed. Add it last, once every nutrient and additive is in the tank, then check the pH.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhen should I add it?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eAfter mixing. Adding pH- before the nutrients means the reading will move again once the feed goes in, so mix everything first, measure, then correct.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003ch3\u003eWorks Well With\u003c\/h3\u003e\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/bluelab-ph-pen\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/bluelab-PH-pen-2-medium_landscape.jpg?v=1746904767\u0026amp;width=160\" alt=\"Bluelab pH Pen\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eBluelab pH Pen\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eMeasures the tank before and after dosing\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/growth-technology-buffer-7\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/Buffer-7_c97fd68c-d378-430b-9571-362cf1e525f8.jpg?v=1786377700\u0026amp;width=160\" alt=\"Growth Technology pH Buffer 7\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eGrowth Technology pH Buffer 7\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eKeeps your pH meter reading true\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/gold-label-coco-ab\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/Gold-Label-Coco-A_B.jpg?v=1786377646\u0026amp;width=160\" alt=\"Gold Label Coco A+B\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eGold Label Coco A+B\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eBase feed from the same range\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/gold-label-hydro-ab\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/gold-label-hydro-ab-1.png?v=1790169454\u0026amp;width=160\" alt=\"Gold Label Hydro A+B\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eGold Label Hydro A+B\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eGold Label base feed for hydro systems\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Gold Label","offers":[{"title":"5L","offer_id":53929919578378,"sku":"NUT-GOLD-015-01","price":47.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/gold-label-ultra-ph-5l-1.jpg?v=1792262935","url":"https:\/\/hydrocropshop.co.uk\/products\/gold-label-ultra-ph","provider":"Hydro Crop Shop","version":"1.0","type":"link"}