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Terra Aquatica Calcium Magnesium 1l
Terra Aquatica Calcium Magnesium Supplement 1 litre is a liquid nutritional supplement with NPK 2-0-0 that targets calcium deficiencies in fast-growing plants. The formula contains 4% CaO and 1% MgO and works rapidly when pH exceeds 5.8. Calcium strengthens cell walls and improves fruit texture, magnesium is essential for chlorophyll production and phosphorus transport. Dosage 1.5 ml per litre of water, 2 ml per litre for RO water, 1-1.5 ml per litre for coco. Use only when deficiency is confirmed — do not combine with TriPart, DualPart Coco or NovaMax. The 1 litre bottle offers the best cost-per-litre for ongoing correction and covers over 660 litres of nutrient solution at standard dosage.
Terra Aquatica Calcium Magnesium 1L – Professional-grade calcium deficiency correction
For growers regularly dealing with calcium deficiencies — particularly when using RO water, coco substrate or intensive lighting — the 1 litre bottle of Terra Aquatica Calcium Magnesium Supplement is the most cost-effective choice. Treating over 660 litres of nutrient solution at standard dosage, this format delivers the best cost-per-litre in the Terra Aquatica programme.
Composition and mode of action
This liquid supplement with NPK 2-0-0 delivers 4% calcium oxide (CaO) and 1% magnesium oxide (MgO) in a directly absorbable form. The nitrogen is predominantly nitric (NO₃ 2.36%) with a small ammoniacal fraction (NH₄ 0.14%), contributing to rapid and balanced uptake:
- Calcium: strengthens cell walls, improves fruit structure, slows ageing, activates vital enzymes and neutralises organic acids in plant sap.
- Magnesium: core component of chlorophyll, stimulates phosphorus transport to growing tips, supports carotenoid and xanthophyll formation.
Dosage by growing method
Use CalMag only when deficiency is confirmed — excess can lock out potassium and iron absorption:
- General application: 1.5 ml per litre of water.
- RO water: 2 ml per litre of water.
- Coco: 1-1.5 ml per litre for substrate moistening, then add to nutrient solution. Continuous use possible for fast-growing plants.
pH requirement: calcium is only absorbed above pH 5.8. Always check pH first. Many growers hold their pH at 5.8 without realising this can already limit calcium uptake. Allow pH to fluctuate slightly between 5.5 and 6.5 for optimal absorption of all elements.
Compatibility with your feed schedule
Do not combine this supplement with TriPart, DualPart Coco or NovaMax — these already contain sufficient calcium. CalMag is specifically designed as a corrective measure. Check roots, pH, humidity and temperature before adding supplemental calcium. If symptoms persist after correction, the issue likely lies with root health or climate conditions.
Use CalMag alongside FloraBloom as a supplement for soft water users on HardWater formulas. Order from plantandflower.be with fast shipping across Belgium.
How many litres can I treat with 1 litre of CalMag?
At the standard dosage of 1.5 ml/L, you can treat over 660 litres of nutrient solution with one 1 litre bottle. With RO water (2 ml/L), that is approximately 500 litres. This format is significantly more cost-effective per treated litre than the 500 ml bottle.
When do calcium deficiencies most commonly occur?
Calcium deficiencies most commonly appear around the fourth or fifth week of flowering, when the plant is growing rapidly and requires substantial calcium for cell wall formation. Under intensive lighting the calcium demand increases further. Watch for symptoms such as brown edges on young leaves, soft fruits or blossom end rot.
Can excess calcium cause damage?
Yes, excess calcium can lock out potassium and iron uptake. In hydroponic systems, surplus calcium can react with sulphur and form deposits in the reservoir. Use CalMag only for confirmed deficiencies and clean the reservoir if deposits appear before reconstituting the nutrient solution.
How do I distinguish calcium deficiency from magnesium deficiency?
Calcium deficiency shows on young leaves and growing tips: brown edges, deformed leaves and soft stems. Magnesium deficiency starts on the older lower leaves with interveinal chlorosis — the leaf tissue yellows while veins remain green. CalMag addresses both deficiencies simultaneously.
