{"product_id":"hesi-ph-plus-ph-minus","title":"HESI pH Plus and pH Minus regulators","description":"\u003cstyle\u003e\n.psc-accordion{font-size:16px;line-height:1.6;}\n.psc-accordion__item{border-top:1px solid rgba(127,127,127,.35);}\n.psc-accordion__item:last-child{border-bottom:1px solid rgba(127,127,127,.35);}\n.psc-accordion__summary{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:24px 0;cursor:pointer;font-weight:700;font-size:16px;color:inherit;list-style:none;}\n.psc-accordion__summary::-webkit-details-marker{display:none;}\n.psc-accordion__summary::marker{content:\"\";}\n.psc-accordion__icon{flex-shrink:0;width:14px;height:14px;transition:transform .2s ease;}\n.psc-accordion__item[open] .psc-accordion__icon{transform:rotate(180deg);}\n.psc-accordion__panel{padding:0 0 24px;font-size:16px;line-height:1.6;}\n.psc-accordion__panel p{margin:0 0 12px;}\n.psc-accordion__panel p:last-child{margin-bottom:0;}\n.psc-accordion__panel ul,.psc-accordion__panel ol{margin:0 0 12px;padding-left:22px;}\n.psc-accordion__panel li{margin-bottom:4px;}\n.psc-accordion__panel h4{font-size:16px;font-weight:700;margin:16px 0 8px;}\n.psc-accordion__panel h4:first-child{margin-top:0;}\n.psc-accordion__panel a{color:inherit;text-decoration:underline;}\n\u003c\/style\u003e\u003cdiv class=\"psc-accordion\"\u003e\n\u003cdetails class=\"psc-accordion__item\"\u003e\u003csummary class=\"psc-accordion__summary\"\u003e\u003cspan\u003eWhy this product?\u003c\/span\u003e\u003csvg class=\"psc-accordion__icon\" viewbox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M3 6l5 5 5-5\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"psc-accordion__panel\"\u003e\n\u003cp\u003eCorrect the pH of a prepared nutrient solution so plants can access nutrients within the appropriate range.\u003c\/p\u003e\n\u003cp\u003eChoose \u003cstrong\u003eHESI pH+\u003c\/strong\u003e when the solution is too acidic or \u003cstrong\u003eHESI pH−\u003c\/strong\u003e when it is too alkaline. Both are concentrated regulators intended for precise, incremental adjustment rather than use at a fixed dosage.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"psc-accordion__item\"\u003e\u003csummary class=\"psc-accordion__summary\"\u003e\u003cspan\u003eWhat sets it apart\u003c\/span\u003e\u003csvg class=\"psc-accordion__icon\" viewbox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M3 6l5 5 5-5\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"psc-accordion__panel\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo directional options:\u003c\/strong\u003e pH+ raises pH, while pH− lowers it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcentrated formulas:\u003c\/strong\u003e Only a small quantity is normally required to change the solution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesigned for nutrient solutions:\u003c\/strong\u003e Adjusts the final mixture after fertilisers and supplements have been added.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable throughout cultivation:\u003c\/strong\u003e Use whenever correction is required during vegetative growth or flowering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUseful for consistent reservoir management:\u003c\/strong\u003e Recording the amount used can provide a reference when preparing the same water and nutrient combination again.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransparent nutrient contribution:\u003c\/strong\u003e pH+ introduces potassium, while pH− introduces phosphorus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse as little regulator as necessary. Both variants alter the nutrient balance and can increase EC, so repeated correction in opposite directions should be avoided.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"psc-accordion__item\"\u003e\u003csummary class=\"psc-accordion__summary\"\u003e\u003cspan\u003eBest suited for\u003c\/span\u003e\u003csvg class=\"psc-accordion__icon\" viewbox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M3 6l5 5 5-5\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"psc-accordion__panel\"\u003e\n\u003cp\u003eHESI pH regulators are primarily intended for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic nutrient solutions\u003c\/li\u003e\n\u003cli\u003eCoco cultivation\u003c\/li\u003e\n\u003cli\u003eSemi-hydroponic and mineral-substrate systems\u003c\/li\u003e\n\u003cli\u003eSelf-watering reservoirs\u003c\/li\u003e\n\u003cli\u003eRecirculating and non-recirculating irrigation systems\u003c\/li\u003e\n\u003cli\u003eSource water that remains outside the required range after nutrients are mixed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor many hydroponic and coco systems, HESI recommends a final pH of approximately \u003cstrong\u003e5.8 to 6.2\u003c\/strong\u003e. The correct target still depends on the plant, growing medium and cultivation system.\u003c\/p\u003e\n\u003cp\u003eRoutine pH correction is generally unnecessary for soil-based cultivation because soil buffers and modifies the root-zone pH differently. Measure the actual substrate conditions before using a concentrated regulator with soil-grown plants.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"psc-accordion__item\"\u003e\u003csummary class=\"psc-accordion__summary\"\u003e\u003cspan\u003eHow to use it\u003c\/span\u003e\u003csvg class=\"psc-accordion__icon\" viewbox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M3 6l5 5 5-5\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"psc-accordion__panel\"\u003e\n\u003col\u003e\n\u003cli\u003eAdd all base fertilisers and compatible supplements to the water.\u003c\/li\u003e\n\u003cli\u003eMix the nutrient solution thoroughly.\u003c\/li\u003e\n\u003cli\u003eMeasure the pH using a calibrated meter.\u003c\/li\u003e\n\u003cli\u003eSelect pH+ if the reading is too low or pH− if it is too high.\u003c\/li\u003e\n\u003cli\u003eAdd a very small amount of the selected regulator to the nutrient solution while mixing.\u003c\/li\u003e\n\u003cli\u003eWait 2 to 3 minutes for the solution to distribute and stabilise.\u003c\/li\u003e\n\u003cli\u003eMeasure again and repeat only if further correction is required.\u003c\/li\u003e\n\u003cli\u003eCheck the EC after adjustment because the regulator contributes additional dissolved minerals.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThere is no universal dose. The amount required depends on the starting pH, water alkalinity, nutrient formula and solution volume. Do not assume that a particular number of drops always produces the same change.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant safety precautions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWear chemical-resistant gloves and protective goggles.\u003c\/li\u003e\n\u003cli\u003eWork in a ventilated area and protect clothing and surrounding surfaces.\u003c\/li\u003e\n\u003cli\u003eNever mix concentrated pH+ and pH− directly together.\u003c\/li\u003e\n\u003cli\u003eNever combine either concentrate directly with undiluted fertiliser.\u003c\/li\u003e\n\u003cli\u003eAdd the regulator to the prepared solution, not water or fertiliser to the regulator bottle.\u003c\/li\u003e\n\u003cli\u003eUse separate, clean dosing tools for pH+ and pH−.\u003c\/li\u003e\n\u003cli\u003eKeep the bottles upright, tightly closed and in their original packaging.\u003c\/li\u003e\n\u003cli\u003eKeep away from children and animals.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBoth products are corrosive and can cause severe skin burns and eye damage. In case of contact, immediately rinse with plenty of water, remove contaminated clothing and follow the instructions on the product label. Obtain urgent medical advice for eye exposure, ingestion or significant skin contact.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"psc-accordion__item\"\u003e\u003csummary class=\"psc-accordion__summary\"\u003e\u003cspan\u003eFormula and contents\u003c\/span\u003e\u003csvg class=\"psc-accordion__icon\" viewbox=\"0 0 16 16\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M3 6l5 5 5-5\" stroke=\"currentColor\" stroke-width=\"1.6\" stroke-linecap=\"round\" stroke-linejoin=\"round\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv class=\"psc-accordion__panel\"\u003e\n\u003cp\u003eHESI provides two concentrated pH regulators:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHESI pH+:\u003c\/strong\u003e 50% potassium hydroxide solution for raising the pH of prepared nutrient solutions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHESI pH−:\u003c\/strong\u003e 59% phosphoric acid solution for lowering the pH of prepared nutrient solutions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable options\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003epH+:\u003c\/strong\u003e 1 × 1 L bottle of HESI pH+.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH−:\u003c\/strong\u003e 1 × 1 L bottle of HESI pH−.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombo:\u003c\/strong\u003e 1 × 1 L bottle of HESI pH+ and 1 × 1 L bottle of HESI pH−.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003epH+ contributes potassium to the nutrient solution, while pH− contributes phosphorus. Both formulas are highly concentrated and corrosive. Always follow the safety instructions on the original packaging and use only the amount required to reach the target pH.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"HESI","offers":[{"title":"pH+","offer_id":51387459928404,"sku":"HE51","price":20.95,"currency_code":"EUR","in_stock":true},{"title":"pH- \u003cbr\u003e","offer_id":51387515306324,"sku":"HE50","price":20.95,"currency_code":"EUR","in_stock":true},{"title":"Combo","offer_id":51387515339092,"sku":"HE5051","price":39.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/8644\/3038\/files\/HESIphplus.png?v=1751436646","url":"https:\/\/plantscraper.com\/products\/hesi-ph-plus-ph-minus","provider":"PlantScraper","version":"1.0","type":"link"}