In StockBiobizz CalMag
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Description
Biobizz CalMag is a high-quality calcium and magnesium supplement formulated to correct common deficiencies and strengthen plant structure. Manufactured by organic experts Biobizz, it's designed for use in soil, coco, or hydroponic systems, and supports healthy growth, greener leaves, and improved nutrient uptake, particularly in areas with soft or reverse osmosis (RO) water.
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Balances Soft or RO Water – Replenishes essential minerals often missing from purified or low-mineral water sources.
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Prevents Common Deficiencies – Supplies readily available calcium and magnesium to avoid yellowing and weak stems.
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Supports Vigorous Growth – Strengthens cell walls and improves enzyme function for robust plant development.
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Compatible with All Systems – Works seamlessly in soil, coco, and hydroponic setups with any nutrient brand.
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Organic-Based Formula – Clean, natural composition that aligns with Biobizz’s eco-friendly growing philosophy.
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Improves Nutrient Uptake – Ensures balanced absorption of other essential elements like potassium and iron.
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Easy to Use – Simple liquid feed that mixes well and stays stable in nutrient solutions.
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Flexible Application – Can be applied via watering or foliar spray for fast correction of visible deficiencies.
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Ideal for Preventative Use – Regular use helps maintain mineral balance throughout the entire grow cycle.
The Biobizz CalMag combines organic purity, reliable correction, and complete compatibility—helping growers maintain healthy, balanced plants with consistent results in any growing system.
Key facts
| Type | Organic-based calcium and magnesium supplement |
|---|---|
| Growing medium | Soil, coco and hydro, with any nutrient brand |
| Apply | In the water, or as a foliar spray for a fast fix |
| Best for | Soft water and reverse osmosis (RO) water |
| Sizes | 500 ml, 1, 5 and 10 litres |
| Brand | Biobizz |
| Category | CalMag Additives |
How to use
Add Biobizz CalMag to the water at the rate on the label, or spray it on the leaves to correct a deficiency you can see. Used regularly, it keeps the mineral balance steady through the whole grow.
The Biobizz feed chart suggests it for soft or RO water, alongside Bio Grow and Bio Bloom. See all our CalMag additives.
Questions
Do I need Biobizz CalMag?
Mostly if your water is soft or you use reverse osmosis water, which lack calcium and magnesium. It also corrects yellowing leaves and weak stems caused by those deficiencies.
Can I spray it on the leaves?
Yes. It can go in with the water or be used as a foliar spray for a fast fix. Follow the rate on the label.
Growers’ guides
- Biobizz Feed Chart 2026: All·Mix and Light·Mix SchedulesThe Biobizz feed chart week by week for Light·Mix, Coco·Mix and All·Mix: Bio·Grow, Bio·Bloom, Top·Max, Root·Juice and the boosters in ml per litre.
- pH and EC Meters: How to Measure, Calibrate and Look After ThemWhat pH and EC tell you, the targets nutrient makers publish, which meter to choose, and how to calibrate it and look after the probe.




