CANNA CalMag Agent | Calcium & Magnesium Supplement for Coco | 1L & 5L

Fix Soft Water. Feed Your Coco. Keep Your Plants Happy. 💧

If you're growing in coco and using soft water or reverse osmosis (RO) water, CANNA CalMag Agent is something you really need. Soft and RO water is naturally low in calcium and magnesium — and coco substrate already holds onto these minerals before your plant can use them. That combination can quietly starve your plants of the nutrients they need most.

CANNA CalMag Agent fixes that. It tops up your calcium and magnesium levels, stabilises your pH, and raises your water's EC to the right starting point — so your plants can actually absorb everything you're feeding them.

Why Coco Growers Using Soft or RO Water Need CalMag

• 💧 Tops up calcium and magnesium — replaces what soft and RO water is missing so your plants never run short
• 🧪 Stabilises pH — acts as a pH buffer to keep your feed consistent and your nutrient uptake on track
• ⚡ Raises water EC — brings your base water EC up to the right level before you add nutrients
• 🌿 Improves nutrient absorption — a balanced divalent ion profile means your plant can take up potassium and other key nutrients properly
• 🌸 Better flowers and bigger yields — healthy calcium and magnesium levels support strong cell walls, better blooms, and more consistent results
• 💪 Stronger, more resilient plants — reduces the risk of deficiencies that slow growth and weaken your crop
• 🥥 Made for CANNA Coco — specifically formulated to work with CANNA Coco substrate and the CANNA Coco nutrient range

Available Sizes

• 1L — great for home growers running one or two plants in coco with soft or RO water
• 5L — best value for larger grows, multiple plants, or growers who use CalMag every feed

Do You Need CalMag?

If your tap water is soft (low EC) or you're running an RO system, yes — you almost certainly need it. Water hardness varies a lot across Australia and New Zealand, and many areas have naturally soft water that isn't ideal for coco growing without a CalMag supplement. Add it to your reservoir before your nutrients every time.

How to Use

• Shake the bottle well before use
• Add CANNA CalMag Agent to your reservoir before adding your base nutrients
• Use as directed on the label based on your starting water EC
• Check EC and pH after adding CalMag before adding other nutrients
• Use throughout the full grow and flower cycle when growing in coco with soft or RO water

Storage & Safety

• Store in a cool, dark place away from frost and direct sunlight
• Keep lid tightly closed between uses
• Keep out of reach of children

CANNA CalMag Agent is the ideal companion to CANNA Coco A+B nutrients and CANNA Coco Professional Plus substrate. Use it every feed for consistent, deficiency-free results.