{"product_id":"hanna-groline-general-purpose-electrode-cleaning-solution","title":"Hanna GroLine General Purpose Electrode Cleaning Solution","description":"\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHanna GroLine General Purpose Electrode Cleaning Solution is formulated to remove mineral deposits, dirt, nutrient residue, and other coatings from compatible pH and ORP electrodes. Regular cleaning helps maintain responsive sensing surfaces, keep reference junctions clear, and support reliable calibration and measurement performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDesigned with hydroponics, aquaponics, greenhouses, indoor gardens, and agricultural testing in mind, this cleaning solution is available in multiple packaging formats. Choose the variant that best matches your meter-maintenance schedule and testing routine.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRemoves electrode buildup:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps dissolve mineral deposits, nutrient residue, dirt, and coatings left behind during testing.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSupports accurate readings:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e A properly cleaned electrode can respond more consistently during calibration and measurement.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHelps clear reference junctions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Regular maintenance reduces the risk of residue obstructing the electrode junction.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePromotes faster response:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Removing surface contamination can help restore normal electrode response time.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eSupports electrode longevity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Routine cleaning may help prevent avoidable performance problems and premature replacement.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDesigned for growers:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Ideal for electrode maintenance in hydroponics, aquaponics, greenhouses, and soil-testing applications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDye-free formulation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Contains no added dyes that could stain sensitive electrode components.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMultiple format options:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Suitable for occasional maintenance, field testing, or regular electrode-care programs.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eProduct Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eManufacturer:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Hanna Instruments\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eProduct line:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e GroLine\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eProduct type:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e General-purpose electrode cleaning solution\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePrimary compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Compatible pH and ORP electrodes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003ePurpose:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Removes mineral deposits, nutrient residue, dirt, and general surface contamination\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eRecommended cleaning time:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 15 to 20 minutes\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFormulation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Dye-free\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eAvailable formats:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Bottle and single-use sachet options\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eApplications:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Hydroponics, aquaponics, greenhouses, indoor gardens, and agricultural testing\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eManufacturer model:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Varies by selected variant\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor combination meters, follow the instrument manual to determine which sensor components may be immersed in cleaning solution. Conductivity sensors may require a different cleaning method or product.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhy Electrode Cleaning Matters\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eA pH meter assumes that its electrode is clean when calibration is performed. Mineral deposits, nutrient salts, organic material, and other coatings can alter the electrode’s response even when the meter appears to accept a calibration buffer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eContamination can also obstruct the reference junction, causing slow stabilization, drifting values, inconsistent readings, or repeated calibration problems. Regular cleaning removes residue that cannot always be eliminated with a simple water rinse.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCleaning does not replace calibration or proper storage. These three maintenance steps work together:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eClean regularly\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e to remove deposits and residue.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eCalibrate as recommended\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e to correct for normal changes in electrode response.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStore properly\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e to keep the pH glass and reference junction hydrated.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eHow to Use\u003c\/span\u003e\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode with distilled or deionized water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePour fresh cleaning solution into a clean vessel or open a single-use sachet, depending on the selected variant.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImmerse the pH bulb and reference junction in the cleaning solution.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAllow the electrode to soak for approximately 15 to 20 minutes.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRemove the electrode and rinse it thoroughly with distilled or deionized water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePlace the electrode in Hanna GroLine Electrode Storage Solution for at least one hour or as directed by the instrument manual.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibrate the meter with fresh buffer solution before returning it to service.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDo not scrub or wipe the glass sensing bulb. Wiping can create static charge or damage the sensitive glass surface.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eAfter-Cleaning Rehydration\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCleaning can temporarily disturb the hydrated layer required for proper pH-electrode response. After cleaning, place the electrode in an appropriate storage or conditioning solution to restore hydration before calibration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAllow at least one hour for routine conditioning. A longer conditioning period may be appropriate for an electrode that was dry, stored incorrectly, or responding slowly. Follow the electrode manufacturer’s instructions when a specific conditioning time is provided.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eNever store a pH electrode in distilled or deionized water. Pure water can deplete the electrode’s reference electrolyte and contribute to slow or unstable readings.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eWhen to Clean an Electrode\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eClean the electrode when:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eReadings drift or stabilize slowly\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCalibration repeatedly fails\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe electrode displays an unusual offset\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVisible deposits are present\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe reference junction appears dirty or discolored\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe probe has been used in concentrated nutrient solution\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe probe has been used in soil, coco, compost, or organic samples\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eThe meter has been stored for an extended period\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRoutine preventive maintenance is due\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eCleaning frequency depends on the samples being tested and how often the electrode is used.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eCompatible Applications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eHanna GroLine General Purpose Cleaning Solution is useful for compatible electrodes used in:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eHydroponic nutrient testing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAquaponic water testing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGreenhouse irrigation monitoring\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIndoor gardening\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSoil and growing-media testing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCoco coir and soilless production\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFertigation management\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAgricultural water testing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePortable pH-meter maintenance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompatible pH and ORP testing systems\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFor EC-only probes and conductivity cells, consult the meter manual before using this product.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eChoosing a Format\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBottle variants are convenient for growers who clean electrodes regularly or maintain multiple meters. Pour only the amount needed into a separate, clean vessel and never return used solution to the original container.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSingle-use sachets provide a fresh portion for each cleaning session and are convenient for occasional maintenance, travel, or use with portable meters. Open the sachet immediately before use and discard the remaining solution afterward.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eStorage and Handling\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eStore the cleaning solution tightly sealed in a clean, dry location away from direct sunlight and extreme temperatures. Keep sachets sealed until immediately before use and close bottle containers promptly after dispensing.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eFollow the expiration date printed on the selected product. Do not use solution that is expired, visibly contaminated, leaking, or stored in damaged packaging.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eImportant Usage Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSelect the desired format from the available product variants.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFollow the electrode or meter manual before cleaning a combination probe.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDo not reuse contaminated cleaning solution.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNever return used solution to the original container.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDo not dilute or combine the solution with other electrode-care products.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDo not scrape or wipe the glass pH bulb.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRinse the electrode after cleaning.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eRehydrate a pH electrode in storage solution before calibration.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eNever store a pH electrode in distilled or deionized water.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCleaning solution does not replace calibration buffer or storage solution.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eKeep out of reach of children and follow the product label and safety information.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hanna Instruments","offers":[{"title":"20 mL Sachet","offer_id":51482896367780,"sku":"HI70061G-1","price":2.29,"currency_code":"USD","in_stock":true},{"title":"500 mL Bottle","offer_id":51482896400548,"sku":"716470","price":22.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1298\/4199\/products\/Hanna_-GroLine-Electrode-Cleaning-Solution_-20-mL-Sachets-Hanna-Instruments-1670272014.jpg?v=1670272016","url":"https:\/\/www.gardensupplyguys.com\/products\/hanna-groline-general-purpose-electrode-cleaning-solution","provider":"GARDEN SUPPLY GUYS","version":"1.0","type":"link"}