Ionic Cal-Mag Pro Calcium and Magnesium Nutrient Supplement

Top Up the Two Elements Coco Quietly Takes Away

Cal-Mag Pro is a supplement that supplies plant-available calcium and magnesium alongside nitrogen, iron, amino acids, humic acids and complex plant extracts. Fast-growing plants draw heavily on both elements, and peak flowering is when demand outstrips supply. It is particularly useful in coco, which holds on to calcium, and in any room running a strong PK booster, where high potassium levels can lock calcium and magnesium out. Available in 300ml, 1 litre and 5 litre.

Key Benefits

• Plant-available forms - calcium and magnesium are supplied in forms the plant can take up straight away.
• Fixes interveinal yellowing - the classic magnesium shortage that shows as yellowing between the leaf veins.
• Addresses calcium spotting - the small dark brown spots with sharp edges that follow a calcium shortfall.
• Built for coco - offsets the calcium that coco fibre binds before the roots ever reach it.
• Supports heavy PK feeding - counters the lockout that high potassium levels can cause in late flower.
• Nitrogen and iron included - keeps new growth green rather than simply patching one element.

The Hidden Cause of Yellowing Leaves

A pale, patchy plant usually gets read as a feed problem, so growers push the EC up and make things worse. More often the elements are present but blocked. Coco binds calcium on the way past, and a heavy PK dose floods the root zone with potassium that competes for the same uptake sites. Adding calcium and magnesium separately restores the ratio instead of raising everything at once.

How to Use

• Add to fresh water before your base nutrient, not into a concentrated feed.
• Stir well, then add the rest of the feed and set pH last.
• Use routinely through coco grows rather than waiting for symptoms.
• Increase during peak flowering and alongside any strong PK booster.
• Never mix the concentrate directly with concentrated PK or silicon products.

Specifications