Description
If you live in a soft water area, then you should be using the newly released CalMag Agent by Canna. Developed due to popular demand, CalMag Agent helps to harden soft water, by introducing additional levels of Calcium and Magnesium to your nutrient solution.
Soft water, generally speaking, has an EC reading of approximately 0.2, the optimum level for strong and healthy plant growth is between 0.4 to 0.7. By using Canna CalMag Agent, it will not only add much needed calcium and magnesium, it will also raise the EC to the required level.
Canna CalMag Agent is a concentrated calcium and magnesium supplement formulated to correct and prevent nutrient deficiencies that can affect plant health and yield. Especially beneficial for growers using coco coir, soft water, or reverse osmosis systems, this additive strengthens cell walls, improves nutrient uptake, and supports vigorous growth..
Designed to stabilise your water and enhance the performance of base nutrients like Canna Coco A & B, CalMag Agent ensures your plants receive the essential minerals they need from start to finish.
Want to avoid common nutrient issues in coco? Read our guide: The Importance Of Using CalMag Supplements
Explore more plant health solutions in our CalMag collection, or browse the full range of Canna Nutrients at Holland Horticulture.
KEY VALUES:
- Helps to stabilise EC levels in soft water regions
- Provides additional levels of Calcium & Magnesium
- Promotes healthier and stronger plant growth
- Improves fruit and flower production
- Can be used in hard water regions when using Reverse Osmosis (RO)
Canna CalMag Agent is also a highly concentrated formula, so just 1ml per litre of water is all that’s needed to make a difference to the health, growth and flower production of your plants.
... Canna CalMag Agent – Essential Ca & Mg for Healthy Growth
Introduce a reliable solution for soft or reverse-osmosis water systems with Canna CalMag Agent. If you're growing in coco, hydroponics or soil and your source water lacks hardness, this additive is designed to bolster your nutrient mix by adding calcium and magnesium—key elements for cell formation, nutrient uptake, and overall plant strength.
Also known as canna calmag, calmag agent canna, or calmag canna, this product ensures your plants avoid common Ca/Mg deficiencies and maintain vigor throughout the growth cycle.
Why Use Canna CalMag Agent?
- Buffers Soft Water: In low-mineral or RO water systems, canna calmag corrects water hardness, bringing EC levels into optimal range.
- Ideal Ca : Mg Ratio: Formulated at approximately 3:1 calcium to magnesium to support balanced uptake.
- Stabilizes pH Over Time: After mixing, the solution tends to drop then rise in pH over 24–48 hours—this helps buffer fluctuations.
- Promotes Strong Plants: Helps prevent deficiencies, leading to better cell strength, reduced necrosis, improved nutrient uptake, and healthier development.
- Supports Flower Quality: In flowering phases, consistent Ca/Mg levels help plants produce dense buds and avoid blossom-related stress or deficiencies.
Tips & Considerations
- If your tap water already has sufficient Ca and Mg (EC ~0.4–0.5), you may not need calmag. Using it in “normal water” may oversaturate the system.
- In very hard water, growers often use reverse osmosis and then reintroduce minerals with Canna CalMag Agent to more precisely control water quality.
- Because CalMag Agent affects EC and pH, always add it before your final adjustments to avoid repeated tweaking.
- Keep the bottle sealed, store between 10 °C and 30 °C, and protect from light and frost.
Why buy From Us?
We supply genuine Canna CalMag Agent in various sizes so you can scale for hobby or commercial grows. With our fast UK delivery and knowledgeable support, you’ll get the real additive you need—no counterfeits or substitutes.