{"product_id":"ionic-ph-buffer-7","title":"Ionic pH Buffer 7 Calibration Solution","description":"\u003ch2\u003eThe neutral reference point every pH meter needs\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIonic pH Buffer 7\u003c\/strong\u003e is a fixed-value solution held precisely at pH 7.00, the neutral midpoint used alongside pH Buffer 4 for a proper two-point calibration. A single-point check only tells you a meter is accurate at one end of the scale; testing against both 4.00 and 7.00 confirms the whole working range your meter actually operates in during feeding.\u003c\/p\u003e\u003cp\u003eMineral deposits and general ageing on the probe's sensing glass cause slow drift that's easy to miss until a feed starts reading wrong. Keeping a bottle of Buffer 7 on the shelf next to Buffer 4 makes proper calibration a five-minute job rather than something that gets put off, and a meter that's out of calibration can silently push an entire nutrient schedule in the wrong direction.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixed pH 7.00\u003c\/strong\u003e neutral reference solution\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompletes a two-point calibration\u003c\/strong\u003e alongside pH Buffer 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with any brand\u003c\/strong\u003e of pH pen, monitor or controller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick to use\u003c\/strong\u003e — decant, calibrate, done\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects feed accuracy\u003c\/strong\u003e by catching drift before it affects plants\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFixed value: pH 7.00 (neutral)\u003c\/li\u003e\n\u003cli\u003eUse: calibration of pH meters, monitors and controllers\u003c\/li\u003e\n\u003cli\u003eRecommended frequency: monthly, or more often with daily use\u003c\/li\u003e\n\u003cli\u003eManufacturer: Growth Technology Ltd\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Growth Technology","offers":[{"title":"300ml","offer_id":53500726182154,"sku":"NUT-GRTE-003-01","price":3.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/Buffer-7_c97fd68c-d378-430b-9571-362cf1e525f8.jpg?v=1786377700","url":"https:\/\/hydrocropshop.co.uk\/products\/ionic-ph-buffer-7","provider":"Hydro Crop Shop","version":"1.0","type":"link"}