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Biobizz Calmag 0,5 l
The 500 ml bottle is the standard size, covering 355 to 1665 litres of solution, a figure rounded down. Calmag is only for reverse osmosis or soft water, against a calcium and magnesium shortfall, either preventively or against an actual shortfall in the water.
Biobizz Calmag 500 ml: soft water brought up to level
Calmag is a calcium and magnesium supplement for growers running reverse osmosis or soft water. It also helps on a lightly fertilised medium and in hydro. It is not a fertiliser and replaces no feed. The 500 ml bottle covers 355 to 1665 litres of solution, the standard size. The weekly plan it runs beside is set out in the Biobizz feed range.
Two tables, not one
The dose follows the medium, and nowhere else in this line do the two columns diverge this far. In medium, give 0.3 ml/L in weeks 1 to 6, then 0.5 ml/L in weeks 6 to 8 and 0.8 ml/L in weeks 8 to 10. In hydro and coco the same sequence starts at 0.5 ml/L in weeks 1 to 6 and moves to 1 ml/L from week 6. If a deficiency shows anyway, the figure rises to 1.2 ml/L in medium and 1.4 ml/L in hydro and coco.
- Medium, weeks 1 to 6: 0.3 ml/L preventively
- Hydro and coco, weeks 1 to 6: 0.5 ml/L preventively
- Late in the run, weeks 8 to 10 in medium: 0.8 ml/L
- Solution pH between 6.2 and 6.5
Choosing the size
At doses this low the question is not whether a bottle will last but how many runs it will see through. At 500 ml you cover 355 to 1665 litres of solution, several full cycles for most set-ups. The 250 ml bottle is for trying it out; the litre suits several installations.
Specifications
| Property | Value |
|---|---|
| Contents | 500 ml |
| Type | liquid calcium and magnesium supplement |
| Condition of use | only with reverse osmosis or soft water |
| Medium, preventive | 0.3 ml/L in weeks 1 to 6; 0.5 ml/L in weeks 6 to 8; 0.8 ml/L in weeks 8 to 10 |
| Hydro and coco, preventive | 0.5 ml/L in weeks 1 to 6; 1 ml/L from week 6 |
| If a deficiency shows | up to 1.2 ml/L in medium and 1.4 ml/L in hydro and coco |
| Yield | 355 to 1665 litres of solution, rounded down |
| Also useful | on a lightly fertilised medium |
Works with
The same supplement comes in Calmag 250 ml and Calmag 1 L. pH is handled separately, with Biobizz Bio-Up 250 ml. The rest of the line is in the Biobizz range; the measuring products sit in pH and EC control.
FAQ - three windows
How does the dose change across the weeks?
It steps up. On medium, the preventive row starts at 0.3 ml/L across weeks 1 to 6, moves to 0.5 ml/L in weeks 6 to 8 and reaches 0.8 ml/L in weeks 8 to 10. In hydro and coco the row starts higher, at 0.5 ml/L, and holds 1 ml/L for the two later windows. The table covers ten weeks of the grow rather than the eight fed weeks of bloom alone.