{"product_id":"groline-ph-4-01-calibration-solution-500ml","title":"GroLine pH 4.01 Calibration Solution - 500ml","description":"\u003cp\u003epH meters should be calibrated frequently (every 1-4 weeks, depending on use). Two-point calibration (using both 4.0 \u0026amp; 7.0 buffers) ensures the most accurate calibration possible. Do not reuse calibration solution, as once it has been used, it is no longer sterile and may result in improper readings. Pour a small amount into a shot glass and discard after use (unless your using using the sachets). Suitable for all makes and models of pH pens and meters.\u003c\/p\u003e","brand":"Hanna Instruments, Inc.","offers":[{"title":"Each","offer_id":41930546970709,"sku":"6833","price":18.32,"currency_code":"USD","in_stock":true},{"title":"Case of 5","offer_id":42385983832149,"sku":"6833-CS5","price":91.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/3426\/6709\/files\/groline-ph-401-calibration-solution-500ml-6833-1027431.png?v=1767475449","url":"https:\/\/www.bghydro.com\/products\/groline-ph-4-01-calibration-solution-500ml","provider":"BetterGrow Hydro","version":"1.0","type":"link"}