{"product_id":"ionic-tonic","title":"IONIC Tonic – Calcium \u0026 Magnesium Booster – Growth Technology","description":"\u003cp\u003e\u003cstrong\u003eType: Mineral\u003c\/strong\u003e\u003cbr\u003eMineral feeds are dissolved minerals your plant can use straight away. They're fast-acting and precise, but it is possible to overdo them, so stick to the dose.\u003c\/p\u003e\n\u003ch3\u003eThe Two Minerals Everybody Forgets\u003c\/h3\u003e\n\u003cp\u003eAsk most growers what plants need and they'll say nitrogen, phosphorus and potassium. Calcium and magnesium rarely make the list, right up until the leaves start yellowing between the veins or new growth comes through spotted and weak. By then the plant has been short for a while.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIONIC Tonic\u003c\/strong\u003e is the calcium and magnesium top-up in the 2026 IONIC range. A small, measured dose keeps both minerals available through the hungriest parts of the grow, and it corrects deficiencies when they appear.\u003c\/p\u003e\n\u003ch3\u003eWhy It Works\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium for structure:\u003c\/strong\u003e builds strong cell walls and sturdy new growth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnesium for green:\u003c\/strong\u003e sits at the heart of chlorophyll, keeping leaves deep green.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrects deficiency:\u003c\/strong\u003e a targeted fix when Ca or Mg runs short.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiny dose:\u003c\/strong\u003e just 0.5–1ml per litre.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor Houseplant \u0026amp; Garden Growers\u003c\/h3\u003e\n\u003cp\u003eWatering with rainwater, filtered water or soft tap water? Growing in coco, or under LED lights? All of these can leave plants short of calcium and magnesium. A small splash of IONIC Tonic in the watering can puts them back.\u003c\/p\u003e\n\u003ch3\u003eFor Growers\u003c\/h3\u003e\n\u003cp\u003eUse alongside any IONIC base feed. The dose depends on your medium:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil and soft-water hydro:\u003c\/strong\u003e 0.5ml\/L from week 6 through flowering (weeks 6–10).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoco:\u003c\/strong\u003e 1ml\/L as a routine top-up from week 3 (weeks 3–10), because coco binds calcium and magnesium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard water hydro:\u003c\/strong\u003e not part of the routine schedule. Use only if you see a recognised deficiency, at 0.5ml\/L for one week.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRose's Pro-Tip:\u003c\/strong\u003e Add Tonic to your water on its own and stir before the base feed goes in. Concentrated calcium and other nutrients don't mix well neat.\u003c\/p\u003e\n\u003ch3\u003eWhich Size?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 Litre:\u003c\/strong\u003e at 0.5–1ml per litre, enough for 1,000–2,000 litres of feed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 Litres:\u003c\/strong\u003e for large or commercial grows\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e calcium and magnesium supplement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose:\u003c\/strong\u003e 0.5–1ml per litre, depending on medium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e soil, coco and hydro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e 1 Litre, 5 Litres\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Growth Technology","offers":[{"title":"1 Litre","offer_id":54899752010074,"sku":"GTCMP1","price":21.99,"currency_code":"GBP","in_stock":true},{"title":"5 Litres","offer_id":54899752042842,"sku":"GTCMP5","price":64.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/9861\/4106\/files\/ionic-nutrients-nutrients-ionic-cal-mag-pro-calcium-magnesium-plant-supplement-1260090864.png?v=1790944667","url":"https:\/\/blackflaghorticulture.com\/pl\/products\/ionic-tonic","provider":"Black Flag Horticulture","version":"1.0","type":"link"}