Calmag – Calcium & Magnesium 5 Liter | Bulk Ca/Mg Support for Soil, Hydro & Coco

Calmag 5L is the cost-effective bulk version of our Ca/Mg supplement, designed for growers with multiple plants or continuous rounds. Calcium strengthens cell walls and supports root and shoot growth; magnesium forms the chlorophyll core and is essential for photosynthesis and sugar accumulation. Preventing and correcting Ca/Mg deficiencies keeps your crop deep green, vital and resilient.

What does Calmag 5L provide?

In systems with additional CO₂, in coco substrates or with very soft tap/osmotic water, the Ca/Mg requirement can be greatly increased. With Calmag 5L, you’ll keep stocked and can fine-tune weekly within your nutrition plan. This translates into uniform growth, stable leaf color and less risk of growth stagnation or leaf problems.

Key benefits

• Corrects and prevents calcium and magnesium deficiencies.
• Increases photosynthesis & energy production (more chlorophyll).
• Universally applicable in soil, hydroponics and coco.
• Economical to use: highly concentrated, low dosage.
• NPK: 0.1 – 0.1 – 0.1 (fits any schedule).

Dosage & usage

• Dosage: 0.1 – 1.0 ml per 1 L of water.
• Frequency: weekly, starting in week 1 of the growth phase.
• CO₂ cultivation: deploy when CO₂ values are elevated; follow your cultivation schedule and monitor EC/PPM and leaf appearance.
• Practical: shake well; store cool, dark and sealed; keep out of reach of children.

Who is 5 liters intended for?

The 5L variant is ideal for serious home and semi-professional growers who want consistent supplemental feeding over multiple plants or cycles. The lower liter price and ample supply make it easy to structurally secure Ca/Mg in your feeding schedule.

Availability: Calmag is available in 1L, 5L, 10L and 20L. Please note that packaging options may vary by country.