{"product_id":"plagron-calmag-pro-500ml","title":"Plagron Calmag Pro 500ml","description":"\u003ch2\u003ePlagron Calmag Pro 500 ml – calcium and magnesium base for RO water in a home tent\u003c\/h2\u003e\n\u003cp\u003eSwitched to an RO filter or growing under LED in one or two tents? Then the 500 ml bottle of \u003cstrong\u003ePlagron Calmag Pro\u003c\/strong\u003e is the practical way to give every feed a stable calcium and magnesium base without buying in bulk.\u003c\/p\u003e\n\u003ch3\u003eWhy it matters\u003c\/h3\u003e\n\u003cp\u003eRO and soft water contain almost no calcium or magnesium. Under LED lighting, plants also transpire less and therefore take up less of both. Calmag Pro forms the \u003cstrong\u003ebase of your nutrient water\u003c\/strong\u003e with a \u003cstrong\u003ebalanced Ca\/Mg ratio\u003c\/strong\u003e (CaO 5.7%, MgO 3.3%, NPK 5-0-0), so the two do not compete with each other. Strong cell walls, plant resilience and young root growth all depend on a steady supply.\u003c\/p\u003e\n\u003ch3\u003eHow far 500 ml goes\u003c\/h3\u003e\n\u003cp\u003eThe maximum dose is 1 ml per litre (1:1,000). With RO water, about 0.75 ml\/L gives a starting EC of roughly 0.4. That means one bottle makes 500 L at full dose, or around 650 L at the RO rate. With a 20 L tank, that is 25 to over 30 fills.\u003c\/p\u003e\n\u003ch3\u003eHow to use it\u003c\/h3\u003e\n\u003cp\u003eShake well and add Calmag Pro to the water first, before your base nutrient, with every watering. A 1 ml syringe or a small measuring cup makes the low dose easy in watering cans. Then add your base nutrients and additives and set the pH to 5.5–6.5. Measure EC after the Calmag step so you know your real starting point.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVolume:\u003c\/strong\u003e 500 ml\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaO \/ MgO:\u003c\/strong\u003e 5.7% \/ 3.3%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDosage:\u003c\/strong\u003e max. 1 ml per litre (1:1,000)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Plagron","offers":[{"title":"Default Title","offer_id":58748611952984,"sku":"C8PLA935953","price":8.98,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/9584\/8792\/files\/69d1c25bdbd4c5fc71d31c5340495237.jpg?v=1791823769","url":"https:\/\/growdealz.com\/products\/plagron-calmag-pro-500ml","provider":"Growdealz","version":"1.0","type":"link"}