{"product_id":"aqua-master-replacement-probes","title":"Aqua Master Replacement Probes - pH \u0026 EC Probes for H600 \u0026 C800","description":"\u003ch2\u003eSwap the Worn Probe and Keep the Meter with Aqua Master Replacement Probes\u003c\/h2\u003e\n\u003cp\u003eGenuine \u003cstrong\u003eAqua Master replacement probes\u003c\/strong\u003e plug straight into the H600 Pro, H600 Pro Substrate and C800 Pro, along with other Aqua Master meters. Choose a \u003cstrong\u003epH probe\u003c\/strong\u003e or \u003cstrong\u003epH substrate probe\u003c\/strong\u003e on a BNC connector (a twist-lock plug), or an \u003cstrong\u003eEC probe\u003c\/strong\u003e or \u003cstrong\u003eEC substrate probe\u003c\/strong\u003e on a small pin connector.\u003c\/p\u003e\n\u003ch3\u003eWhy You Need It\u003c\/h3\u003e\n\u003cp\u003epH probes age. Over time the reference liquid inside gets contaminated, response slows, and eventually the probe stops calibrating. EC probes are tougher but can still fail from limescale, leaks or a cable that's hardened with age. Either way, the meter's fine. Swap the probe, recalibrate, carry on.\u003c\/p\u003e\n\u003ch3\u003eWhich Probe Fits Your Meter?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003epH probe, BNC (AMT1021.2)\u003c\/th\u003e\n\u003ctd\u003eH600 Pro, H600 Pro Substrate, C800 Pro, P700 Pro2, S300 Pro2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003epH substrate probe, BNC (AMT1031)\u003c\/th\u003e\n\u003ctd\u003eH600 Pro, H600 Pro Substrate, P700 Pro2, S300 Pro2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEC probe, small pin (AMT1023)\u003c\/th\u003e\n\u003ctd\u003eH600 Pro, H600 Pro Substrate, C800 Pro, E300 Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEC substrate probe, small pin (AMT1036)\u003c\/th\u003e\n\u003ctd\u003eH600 Pro, H600 Pro Substrate, E300 Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-w650-pro-inline-monitor\"\u003eW650 Pro Inline\u003c\/a\u003e uses its own threaded inline probes. For the P700 Pro2's EC electrode, see the \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-p700-pro2-replacement-ec-electrode\"\u003eP700 Pro2 Replacement EC Electrode\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eLiquid or Substrate?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard pH probe:\u003c\/strong\u003e a long double junction design (two reference chambers instead of one), which gives it a longer working life in liquids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003epH substrate probe:\u003c\/strong\u003e a glass tip in a tough plastic body, made for pushing into soft, moist media like coco, compost and grow bags.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEC substrate probe:\u003c\/strong\u003e stainless steel and almost unbreakable, built for daily use in media.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow To Fit an Aqua Master Probe\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnplug the old probe:\u003c\/strong\u003e twist off the BNC plug or pull the pin connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug in the new one:\u003c\/strong\u003e it only goes one way.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoak pH probes:\u003c\/strong\u003e stand them in tap water for at least 12 hours before first use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrate:\u003c\/strong\u003e calibrate the meter before taking readings.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eTop tip:\u003c\/strong\u003e Keep pH probes wet with a few drops of \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/growth-technology-ph-probe-refill-storage-solution-300ml\"\u003eKCl storage solution\u003c\/a\u003e in the cap. Dry glass is slow glass.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThere's white crust on my new pH probe. Is it faulty?\u003c\/strong\u003e\u003cbr\u003eNo. Dried salts are normal and the 12-hour soak dissolves them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I add substrate probes to a standard H600 Pro?\u003c\/strong\u003e\u003cbr\u003eYes. Both H600 Pro meters take liquid and substrate probes, so one meter can cover your reservoir and your media.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed help choosing?\u003c\/strong\u003e Call our growing experts on 01782 749955 or visit One Stop Grow Shop Stoke at Fenton Trade Park.\u003c\/p\u003e\n\u003cp\u003eGot the probes, need the meter? \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/collections\/grow-tools-slash-accessories-meters\"\u003eBrowse our full range of pH and EC meters\u003c\/a\u003e.\u003c\/p\u003e","brand":"AQUA MASTER","offers":[{"title":"pH Probe (BNC)","offer_id":57511659864442,"sku":null,"price":41.99,"currency_code":"GBP","in_stock":false},{"title":"pH Substrate Probe (BNC)","offer_id":57511659897210,"sku":null,"price":48.99,"currency_code":"GBP","in_stock":false},{"title":"EC Probe (Small Pin)","offer_id":57511659929978,"sku":null,"price":41.99,"currency_code":"GBP","in_stock":false},{"title":"EC Substrate Probe (Small Pin)","offer_id":57511659962746,"sku":null,"price":52.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/6368\/6447\/files\/ph_probe_bnc.jpg?v=1793877317","url":"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-replacement-probes","provider":"One Stop Grow Shop","version":"1.0","type":"link"}