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General Hydroponics / Hydroponics

General Hydroponics CALiMAGic 1-0-0, 1 US Quart

CALiMAGic is a targeted calcium and magnesium supplement, so its value depends on what the water and base fertilizer already provide. The quart bottle is a manageable size for a small system when there is a documented reason to supplement, such as a feeding program designed around low-mineral water. It should not become an automatic response to every pale leaf or damaged fruit. Start by identifying the plant symptom, checking the root environment, and reading the base nutrient label. This product also carries nitrogen in its 1-0-0 analysis, which matters when comparing it with other products loosely described as Cal-Mag. A grower changing brands should compare the actual labels instead of transferring a remembered spoonful. For purchasing, the specific US quart package is HGC733525; that identity helps avoid accidentally comparing a gallon, case, or differently labeled regional bottle. Choose it when your nutrient plan shows a calcium or magnesium gap and you can account for the addition in the complete solution. If the plan already supplies enough, keeping the extra bottle out of the routine makes records and diagnosis simpler.

Research-based guidance, not hands-on testing. Our method.

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Specifications that matter

View cited product source ↗
Exact US SKU
HGC733525
Bottle volume
1 US quart
N-P-K
1-0-0
Role
Calcium and magnesium supplement
Form
Concentrated liquid
Application context
Manufacturer lists hydroponic reservoirs and liquid feeding programs
Mixing constraint
Avoid contact with other undiluted fertilizer concentrates
Storage
Original container, tightly closed and upright, in a cool dry location protected from direct sun

Additional sources: Hawthorne US quart SKU and pack specifications · General Hydroponics CALiMAGic US SDS

Source record researched 2026-09-14. Specifications can change; confirm the exact variant before buying.

Tradeoffs & verification notes

A supplement rather than a complete hydroponic base fertilizer.

Adds nitrogen as well as calcium and magnesium; account for the whole formula.

Plant symptoms alone do not establish that adding calcium or magnesium will solve the problem.

Required amount depends on water, crop, medium, and other fertilizers; label rates are not universal prescriptions.

Our research standard

This profile summarizes published product information. It is not a hands-on review, an independent durability test, or a guarantee of performance. We prefer an explicit limitation to an unsupported score.

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