






Biobizz Calmag
- Calcium + magnesium support
- For soft, RO or demineralised water
- Supplement only
Quick facts
- Type
- CalMag supplement
- Substrates
- Soil / potting mix, Coco, Hydro, and Passive semi-hydro
- Dosage
- 0.3-1.4 ml/L
- Frequency
- Weekly
- Skill level
- Intermediate
- pH/EC
- Recommended
VAT included · plus
Please note: Most fertilizers ship separately from plants. A separate shipping fee may apply, and the final cost is calculated at checkout by order weight. Free shipping does not apply.
Biobizz Calmag fills a mineral gap in organic-style feeding. It is most relevant with soft water, coco or semi-hydro situations where calcium and magnesium need attention.
Mineral balance within Biobizz
It suits coco, semi-hydro, soft water and water-grown plants where calcium and magnesium need extra attention. It is not the first bottle for ordinary soil feeding.
When to reach for it
Use Calmag when the setup points to calcium or magnesium demand: soft water, inert media, coco, strong grow lights or visible deficiency patterns alongside an otherwise good feed plan.
Most fertilizers and additives are packed and shipped separately from plants.
Because of this, they may have their own shipping charge. Your final delivery cost is shown at checkout and is calculated by the total weight of your order.
Free shipping does not apply to fertilizer and additive products.
- Fertilizer choice guide: Compare liquid, slow-release, organic, and mineral fertilizers, read NPK labels, and match feeding to your plant’s substrate and light.
- Beginner fertilizing routine: Learn the basics of nutrients, safe dilution, feeding timing, flushing, and how to avoid burning houseplant roots.
- Semi-hydro fertilizing: Feed plants in LECA, pon, pumice, and reservoir setups with better control over nutrients, EC, pH, top-ups, and salt resets.
Please head to our FAQ Page or Contact us.
What's inside:
- NPK Ratio: No NPK / organic calcium and magnesium supplement
- Nutrient basis: Organic Ca/Mg supplement with calcium, magnesium and humic-acid support





