CANNA CALMAG Agent 250 mL Calcium and Magnesium

CANNA CALMAG Agent is a liquid calcium and magnesium concentrate for preparing soft or reverse-osmosis water. Add it to your starting water before mixing the base nutrient. The amount you need depends on the water’s initial EC and mineral content, together with the growing medium.

How do you use CANNA CALMAG Agent?

1. Measure the starting EC of your irrigation water. CANNA’s mixing directions specify water at 20–22 °C.
2. Shake the bottle. For soft water, CANNA UK gives a rate of 0.1–0.5 mL per litre, or 1–5 mL per 10 L of water.
3. Add the concentrate gradually, mix and measure EC again. CANNA UK gives a target of about 0.4 mS/cm at this stage. Follow the label on your bottle.
4. Once the starting water is ready, mix in your base nutrient and any other additions according to their directions. Check the final feed’s EC and pH against your growing programme.

When can you use it in soil, coco or hydroponics?

You can use it to prepare low-mineral water for all three media. Common examples are reverse-osmosis water and soft water with low calcium or magnesium. With tap water, consider measured calcium and magnesium as well as EC. EC reflects the combined effect of dissolved ions, so it does not tell you how much calcium or magnesium is present.

Frequently asked questions

How much water can each pack treat?

Using CANNA UK’s example rates of 0.1–0.5 mL/L, 250 mL treats about 500–2,500 L, 1 L treats 2,000–10,000 L, and 5 L treats 10,000–50,000 L. These are calculated examples. Actual use depends on the starting water and pack directions.

Should I add CALMAG before my base nutrients?

When preparing soft water, add CALMAG Agent to the water first and measure EC. Add the base nutrient and other additions afterwards. The starting-water target of about 0.4 mS/cm is separate from the target EC of the finished feed.

Do I use the same dose at every watering?

Check the starting water each time you prepare a fresh batch. A change in source or mineral content can change the dose. For hard or high-EC water, check the mineral composition before adjusting it.

How should I store the bottle?

CANNA recommends storing it tightly closed in the original container at 10–30 °C, away from frost and direct sunlight.

Source CANNA CALMAG Agent manufacturer instructions. See also the Yeşil Grow CANNA feeding charts.