{"product_id":"advanced-nutrients-sensi-cal-mag-xtra","title":"Advanced Nutrients Sensi Cal Mag Xtra Calcium Magnesium Iron","description":"\u003ch2\u003eCalcium, magnesium and iron for RO water and hard-driven rooms\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eSensi Cal Mag Xtra\u003c\/strong\u003e supplies \u003cstrong\u003ecalcium, magnesium and iron\u003c\/strong\u003e for growers on reverse osmosis or soft water, and for any room where high light intensity has pushed demand past what the base feed carries.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree elements, not two\u003c\/strong\u003e - the iron matters as much as the calcium and magnesium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrects RO and soft water\u003c\/strong\u003e - a filter removes exactly what this puts back\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports high-intensity lighting\u003c\/strong\u003e - LED and CDM raise transpiration and with it calcium demand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChelated iron\u003c\/strong\u003e - stays available across a wide pH band\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with any base\u003c\/strong\u003e - not restricted to the Advanced Nutrients programme\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eYellowing between the veins under strong light\u003c\/h3\u003e\u003cp\u003eInterveinal yellowing on older leaves is magnesium, on newer leaves it is iron, and crisping tips are calcium. All three appear together on RO water under hard lighting, and all three look like they need more feed. Raising EC makes it worse.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRO and soft water:\u003c\/strong\u003e \u003cstrong\u003e1 ml per litre\u003c\/strong\u003e added to plain water before the base feed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard water:\u003c\/strong\u003e usually unnecessary - test before adding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-intensity lighting:\u003c\/strong\u003e up to \u003cstrong\u003e2 ml per litre\u003c\/strong\u003e through peak flower\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoliar:\u003c\/strong\u003e \u003cstrong\u003e2 ml per litre\u003c\/strong\u003e as a light mist, lights off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing:\u003c\/strong\u003e never alongside a concentrated phosphate feed\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\u003eElements:\u003c\/strong\u003e Calcium, magnesium and chelated iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest for:\u003c\/strong\u003e RO, rainwater and soft supplies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical dose:\u003c\/strong\u003e 1 to 2 ml per litre\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoliar:\u003c\/strong\u003e 2 ml per litre, lights off\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with:\u003c\/strong\u003e Any base feed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e All\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"hcs-dosing\" style=\"margin:32px 0 0;border:1px solid #e6e6e6;border-radius:12px;overflow:hidden;font-family:Montserrat,-apple-system,'Segoe UI',sans-serif;\"\u003e\n\u003cdiv style=\"background:#101010;padding:16px 20px;border-bottom:3px solid #efc04c;\"\u003e\n\u003cdiv style=\"color:#ffffff;font-size:17px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;\"\u003eFeed Chart\u003c\/div\u003e\n\u003cdiv style=\"margin-top:6px;color:#b8b8b8;font-size:12px;line-height:1.5;\"\u003eAdvanced Nutrients Sensi Cal Mag Xtra · all media\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;color:#2b2b2b;background:#fff;\"\u003e\n\u003ctr style=\"background:#f4f4f4;\"\u003e\n\u003cth style=\"text-align:left;padding:10px 20px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6b6b6b;font-weight:600;\"\u003eWater or application\u003c\/th\u003e\n\u003cth style=\"text-align:right;padding:10px 14px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6b6b6b;font-weight:600;white-space:nowrap;\"\u003ePer 1 L\u003c\/th\u003e\n\u003cth style=\"text-align:right;padding:10px 20px;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#6b6b6b;font-weight:600;white-space:nowrap;\"\u003ePer 10 L\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eRO and soft water\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e1 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e10 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#fcfaf4;\"\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eHigh-intensity lighting, through peak flower\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e2 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e20 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;\"\u003eFoliar mist, lights off\u003c\/td\u003e\n\u003ctd style=\"padding:12px 14px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;font-weight:600;\"\u003e2 ml\u003c\/td\u003e\n\u003ctd style=\"padding:12px 20px;border-top:1px solid #ededed;text-align:right;white-space:nowrap;color:#6b6b6b;\"\u003e20 ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"background:#101010;padding:12px 20px;font-size:12px;color:#b8b8b8;line-height:1.6;\"\u003e\n\u003cspan style=\"color:#efc04c;font-weight:600;\"\u003eNote\u003c\/span\u003e — Add to plain water before the base feed, never alongside a concentrated phosphate feed. On hard water it is usually unnecessary — test before adding. Check pH and EC after mixing.\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Advanced Nutrients","offers":[{"title":"250ml","offer_id":53496878956810,"sku":"NUT-ADB-008-01","price":10.49,"currency_code":"GBP","in_stock":true},{"title":"500ml","offer_id":53496878989578,"sku":"NUT-ADB-008-02","price":18.49,"currency_code":"GBP","in_stock":true},{"title":"1L","offer_id":53496879022346,"sku":"NUT-ADB-008-03","price":23.45,"currency_code":"GBP","in_stock":true},{"title":"4L","offer_id":53496879055114,"sku":"NUT-ADB-008-04","price":93.49,"currency_code":"GBP","in_stock":true},{"title":"5L","offer_id":53496879087882,"sku":"NUT-ADB-008-05","price":121.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/nutrients-advanced-nutrients-sensi-cal-mag-xtra-37662719181015.jpg?v=1786221446","url":"https:\/\/hydrocropshop.co.uk\/products\/advanced-nutrients-sensi-cal-mag-xtra","provider":"Hydro Crop Shop","version":"1.0","type":"link"}