BIOBIZZ CalMag Calcium & Magnesium Supplement
BIOBIZZ CalMag Calcium & Magnesium Supplement
BIOBIZZ CalMag – Organic Calcium and Magnesium for Soft, Rain and Filtered Water
Rainwater is the gold standard for watering plants, except for one catch. Like filtered and reverse-osmosis water, it contains almost no calcium or magnesium, and plants need both. Calcium builds strong cell walls and new growth; magnesium sits at the heart of every chlorophyll molecule. Run short and you'll see it: rusty spots, yellowing between the veins, weak new leaves, or blossom end rot on tomatoes. Biobizz CalMag puts both back, from 100% natural, organically certified sources, without disturbing the rest of your feeding.
Perfect For
- Anyone watering with rainwater, filtered water or RO water, or living in a soft-water area
- Calathea and other fussy houseplants kept on rainwater or filtered water
- Semi-hydro (LECA and pon) and coco growers, where Ca/Mg shortages are common
- Tomatoes and peppers prone to blossom end rot
- Growers on soil, coco and hydro
Key Benefits
- Organic calcium (4.2% CaO) and magnesium (1.7% MgO)
- Nitrogen-free, so it won't upset your feeding regime
- Prevents and corrects Ca/Mg deficiencies
- Works with any Biobizz or other feed
- Can also be used as a foliar spray
How to Use
Add CalMag to your water first, stir, then add your other feeds. 1ml per litre raises EC by about 0.1.
| Soil and compost | Coco, hydro and semi-hydro | |
|---|---|---|
| Prevention | 0.3–0.8ml per litre | 0.5–1ml per litre |
| Correcting a deficiency | 0.3–1.2ml per litre | 0.5–1.4ml per litre |
🌿 Rose's Pro-Tip: if you've switched your Calathea to rainwater to stop crispy edges (good move), add a splash of CalMag. You keep the soft water it loves, without starving it of minerals.
Sizes
250ml, 500ml, 1L, 5L and 10L. At under 1ml per litre, even 250ml goes a very long way. Add a measuring syringe for accurate dosing.
Black Flag Horticulture Ltd, Coventry – proud stockists of Biobizz.