{"title":"Calibration \u0026 Reference Solutions","description":"\u003ch2\u003eCalibration \u0026amp; Reference Solutions and Green Houses Benefits\u003c\/h2\u003e\n\u003cp\u003epH measuring pens and probes should always be calibrated regularly in order to give accurate readings in hydroponic system. Good quality hydroponics solutions or reference solutions are thus important and growers need to pick from different pH values based on their requirement. You can also use EC calibration solutions and strips to test the pH of growing media or nutrient solutions. Order \u003ca href=\"https:\/\/www.zenhydro.com\/ph-ppm-tds-ec\/calibration-reference-solution.html\"\u003eCalibration \u0026amp; Reference Solutions \u003c\/a\u003esuch as Bluelab conductivity pen calibration, Advanced Nutrients products online from Zenhydro.\u003c\/p\u003e\n","products":[{"product_id":"oakton-calibration-ph-7-01-500-ml","title":"Oakton Calibration pH 7.01 500 ml","description":"","brand":"Oakton","offers":[{"title":"Default Title","offer_id":40808442200245,"sku":"GL56716112","price":16.41,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/716112-01_1.jpg?v=1629885590"},{"product_id":"oakton-calibration-1413-tds-500-ml","title":"Oakton Calibration 1413 TDS 500 ml","description":"","brand":"Oakton","offers":[{"title":"Default Title","offer_id":40808442790069,"sku":"GL56716114","price":16.41,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/716114-01_1.jpg?v=1629885594"},{"product_id":"hm-digital-1000-ppm-calibration-solution","title":"HM Digital 1000 PPM Calibration Solution","description":"","brand":"HM Digital","offers":[{"title":"Default Title","offer_id":40808446263477,"sku":"GL56716170","price":4.97,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/716170-01_1.jpg?v=1629885626"},{"product_id":"milwaukee-m10007b-20-ml-packet-7-01-buffer-solution-pack-of-25-pieces","title":"Milwaukee M10007B - 20 ml Packet 7.01 Buffer Solution, Pack of 25 Pieces","description":"\u003cb\u003ePrice shown is per unit; add to cart for case price.\u003c\/b\u003e","brand":"Milwaukee","offers":[{"title":"Default Title","offer_id":40808457601205,"sku":"GL56716306X25","price":20.45,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/716306-01_1.jpg?v=1629885656"},{"product_id":"gh-1500-ppm-reference-solution-8-oz","title":"GH 1500 PPM Reference Solution 8 oz","description":"","brand":"General Hydroponics","offers":[{"title":"Default Title","offer_id":40808477294773,"sku":"GL56722005","price":5.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/722005-01_1.jpg?v=1629885805"},{"product_id":"gh-ph-4-01-calibration-solution-8-oz","title":"GH pH 4.01 Calibration Solution 8 oz","description":"\u003cp\u003eGeneral Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics® technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.\u003c\/p\u003e","brand":"General Hydroponics","offers":[{"title":"Default Title","offer_id":40808477753525,"sku":"GL56722015","price":1.12,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/722015-01_1.jpg?v=1629885809"},{"product_id":"gh-ph-4-01-calibration-solution-quart","title":"GH pH 4.01 Calibration Solution Quart","description":"\u003cp\u003eGeneral Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics® technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.\u003c\/p\u003e","brand":"General Hydroponics","offers":[{"title":"Default Title","offer_id":40808478245045,"sku":"GL56722020","price":13.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/722020-01_1.jpg?v=1629885814"},{"product_id":"gh-ph-7-01-calibration-solution-8-oz","title":"GH pH 7.01 Calibration Solution 8 oz","description":"\u003cp\u003eGeneral Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics® technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.\u003c\/p\u003e","brand":"General Hydroponics","offers":[{"title":"Default Title","offer_id":40808480506037,"sku":"GL56722030","price":4.31,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/722030-01_1.jpg?v=1629885818"},{"product_id":"gh-ph-7-01-calibration-solution-quart","title":"GH pH 7.01 Calibration Solution Quart","description":"\u003cp\u003eGeneral Hydroponics® uses the highest quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General Hydroponics® technicians check each batch to ensure that our solutions are precisely calibrated and yield reliable readings each time they are used.\u003c\/p\u003e","brand":"General Hydroponics","offers":[{"title":"Default Title","offer_id":40808480833717,"sku":"GL56722035","price":0.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/722035-01_1.jpg?v=1629885821"},{"product_id":"gh-ph-test-kit-1-oz","title":"GH pH Test Kit 1 oz","description":"\u003cp\u003eGeneral Hydroponics® pH Test Kits make pH testing easy. Simply fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator and observe the coloration of the liquid in the test vial. Many experienced growers prefer our pH Test Kit to expensive electronic meters because of its reliability and ease of use, which are important factors when the health of a valuable crop is at stake. Use 3 drops per 5 ml of solution.\u003c\/p\u003e","brand":"General Hydroponics","offers":[{"title":"Default Title","offer_id":40808482734261,"sku":"GL56722145","price":1.25,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/722145-01_1.jpg?v=1629885826"},{"product_id":"bluelab-ph-7-0-calibration-solution-20-ml-sachets-pack-of-25-pieces","title":"Bluelab pH 7.0 Calibration Solution 20 ml Sachets, Pack of 25 Pieces","description":"\u003cb\u003ePrice shown is per unit; add to cart for case price.\u003c\/b\u003e","brand":"Coco-can","offers":[{"title":"Default Title","offer_id":40808483061941,"sku":"GL56732894X25","price":36.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/732894-01_1.jpg?v=1629885830"},{"product_id":"bluelab-ph-7-0-calibration-solution-250-ml","title":"Bluelab pH 7.0 Calibration Solution 250 ml","description":"\u003cp\u003epH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). Calibration Solutions should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.\u003c\/p\u003e","brand":"BlueLab","offers":[{"title":"Default Title","offer_id":40808483160245,"sku":"GL56732895","price":1.73,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/732895-01_1.jpg?v=1629885834"},{"product_id":"bluelab-ph-7-0-calibration-solution-500-ml","title":"Bluelab pH 7.0 Calibration Solution 500 ml","description":"\u003cp\u003epH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). Calibration Solutions should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.\u003c\/p\u003e","brand":"Coco-can","offers":[{"title":"Default Title","offer_id":40808483651765,"sku":"GL56732896","price":10.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/732896-01_1.jpg?v=1629885837"},{"product_id":"bluelab-ph-4-0-calibration-solution-250-ml","title":"Bluelab pH 4.0 Calibration Solution 250 ml","description":"\u003cp\u003epH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). Calibration Solutions should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.\u003c\/p\u003e","brand":"BlueLab","offers":[{"title":"Default Title","offer_id":40808483979445,"sku":"GL56732897","price":1.86,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/732897-01_1.jpg?v=1629885843"},{"product_id":"bluelab-ph-4-0-calibration-solution-500-ml","title":"Bluelab pH 4.0 Calibration Solution 500 ml","description":"\u003cp\u003epH measuring equipment must be cleaned and calibrated regularly to ensure they are giving the user accurate readings. pH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope). Calibration Solutions should be stored in a cool place out of direct sun and heat. They should be stored with the lids securely tightened.\u003c\/p\u003e","brand":"BlueLab","offers":[{"title":"Default Title","offer_id":40808484208821,"sku":"GL56732898","price":10.53,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0591\/4502\/7765\/products\/732898-01_1.jpg?v=1629885847"},{"product_id":"bluelab-2-77ec-conductivity-solution-250-ml","title":"Bluelab 2.77EC  Conductivity Solution 250 ml","description":"\u003cp\u003eThe EC2.77 solution is used as a reference or checking solution to ensure you have adequately cleaned the EC\/ppm probe. Calibration Solutions should be stored in a cool place out of direct sun and heat. Please keep out of reach of children. 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