Greenway Biotech Cal-Mag Plus Concentrate
Best nutrient supplement for home gardeners seeking professional plant vitality.
This concentrated powder provides essential calcium, magnesium, and iron to prevent common deficiencies in water-based growing systems. It serves as a foundational nutrient source, ensuring structural integrity and optimal photosynthesis for plants grown in purified water or coco coir.
$33.99
at
Greenway Biotech
More Cal-Mag Plus options
Who it's for
- Gardeners seeking rapid recovery for nutrient-deficient plants
- Multi-method growers needing a single, reliable nutrient supplement
- Budget-conscious cultivators managing large-scale gardens or frequent feedings
Who should skip it
- Indoor hobbyists working in carpeted or finished living spaces
- Novice growers without precise graduated measuring tools
- Users who prefer low-maintenance, ready-to-pour liquid fertilizers
Performance breakdown
Nutrient Bioavailability
Chelated iron ensures rapid absorption even in fluctuating pH environments.
System Compatibility
Chloride-free formula prevents clogging in delicate drip emitters and pumps.
Concentration Efficiency
Powdered format eliminates water weight, maximizing value per shipping dollar.
RO Water Correction
Perfectly balances mineral-stripped water for optimal hydroponic reservoir health.
Solubility Rate
Dissolves completely without leaving residue or sediment in the tank.
Deficiency Prevention
Targeted calcium and magnesium levels effectively stop common growth stunting.
Key Specs
Weight
2.5 lbs
NPK Ratio
2-0-0
Calcium Content
3.2%
Magnesium Content
1.2%
Iron Content
0.1% (EDTA-chelated)
Solubility
Fully water soluble
pH Range
5.0-6.5
Origin
Made in California
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