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General Hydroponics CALiMAGic - 1 Quart

Regular price $33.99
Regular price Sale price $33.99
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Description

General Hydroponics CALiMAGic is a fully soluble calcium–magnesium plant nutrient additive (cal-mag) formulated to provide additional calcium (Ca) and magnesium (Mg) alongside a complete base fertilizer program—especially in higher-demand feeding schedules.

The guaranteed analysis is NPK 1-0-0, supplying nitrate nitrogen plus calcium, magnesium, and chelated iron. This straightforward formula is commonly chosen by growers who want a dedicated cal-mag additive that integrates cleanly into reservoir mixing and routine watering.

CALiMAGic is compatible with a wide range of grow methods and media, including hydroponics and water culture systems, as well as substrates like rockwool, coco coir, peat-lite mixes, potting mixes, and in-ground soil. It’s also a common fit for drip-fed gardens where a fully soluble cal-mag product is preferred.

A solid option for growers looking for a dependable General Hydroponics cal-mag with 1-0-0 analysis and chelated iron, designed for broad use across hydroponic and soil-based gardens.

Product benefits: Vegetative Stage; Flowering Stage; Indoor; Outdoor; Regular Watering; Watering Systems; Hydroponics; Coco Coir Safe; Soil; Soilless; Growth Support; Calcium Support; Magnesium Support; Deficiency Support; Dripper Friendly; Multi-Media Ready; Multi-System Use; All-Stage Support.

Guaranteed analysis: Total Nitrogen (N): 1.0%; Calcium (Ca): 5.0%; Total Magnesium (Mg): 1.5%; Boron (B): 0.006%; Copper (Cu): 0.004%; Total Iron (Fe): 0.1%; Total Manganese (Mn): 0.015%; Molybdenum (Mo): 0.0004%; Zinc (Zn): 0.0065%; EDTA (Chelating Agent): 0.15%; DTPA (Chelating Agent): 0.75%.

Derived from: Calcium Carbonate; Magnesium Nitrate; Iron DTPA.

How To Use

How to Use General Hydroponics CALiMAGic - 1 Quart

Step-by-step mixing and feeding instructions for General Hydroponics CALiMAGic - 1 Quart.

Mixing & preparation

Fill your reservoir or watering container with clean, room-temperature water first. Shake the bottle of General Hydroponics CALiMAGic - 1 Quart well before every use. Using the feeding schedule below, measure the recommended dose and add it directly to the water while stirring. Allow the solution to mix fully before adding any other fertilizers, additives, or supplements.

Always add nutrients to water — not the other way around. Mix thoroughly between products to ensure an even, stable nutrient solution.

Week-by-week feeding schedule

Vegetative stage — CALiMAGic

  • Week 1: do not use this product during this week of vegetative growth.
  • Week 2: mix 0.32 ml per litre of water or nutrient solution.
  • Week 3: mix 0.32 ml per litre of water or nutrient solution.
  • Week 4: mix 0.63 ml per litre of water or nutrient solution.

Flowering stage — CALiMAGic

  • Week 1: mix 0.53 ml per litre of water or nutrient solution.
  • Week 2: mix 0.53 ml per litre of water or nutrient solution.
  • Week 3: mix 0.53 ml per litre of water or nutrient solution.
  • Week 4: mix 0.53 ml per litre of water or nutrient solution.
  • Week 5: mix 0.53 ml per litre of water or nutrient solution.
  • Week 6: mix 0.4 ml per litre of water or nutrient solution.
  • Week 7: mix 0.4 ml per litre of water or nutrient solution.
  • Week 8: do not use this product during this week of flowering.
  • Week 9: do not use this product during this week of flowering.

Tips for best results

  • Maintain pH and EC/ppm within the range recommended for your growing medium and crop.
  • Use fresh nutrient solution whenever possible and avoid leaving mixed solution stagnant for long periods.
  • Store nutrients in a cool, dark place away from direct sunlight and extreme temperatures.
  • Keep bottles tightly sealed when not in use to reduce air exposure and preserve product quality.
  • Use clean measuring tools and regularly rinse or clean your reservoir, lines, and irrigation equipment.

Common mistakes to avoid

  • Do not mix different nutrients or additives together in concentrated form before adding them to water.
  • Do not exceed the recommended dosage unless you are following a tested, crop-specific feeding plan.
  • Do not skip pH or EC/ppm checks when growing in hydroponic or soilless systems.
  • Do not allow the nutrient solution to freeze or overheat, as this can damage the formulation.
  • Do not ignore the directions on the product label for your specific crop, growth stage, and system type.

Warnings & Safety

Warning – Important Safety Information

This product may cause mild skin irritation and eye irritation. Avoid unnecessary contact with skin, eyes, and clothing. Use only as directed.

General safety precautions

Read and follow all instructions on the product label and any accompanying documentation before use. Keep out of reach of children and pets. Do not ingest. Avoid breathing vapours, mist, or dust that may be generated during handling or use.

Wear appropriate personal protective equipment (PPE), such as protective gloves, long sleeves, long pants and closed-toe footwear. When there is a risk of splashing or airborne particles, use safety glasses or other suitable eye and face protection.

First aid – skin contact

IF ON SKIN OR HAIR: Remove contaminated clothing immediately. Rinse skin with clean water for several minutes, then wash with mild soap and water. If irritation or redness develops and persists, seek medical attention. Wash contaminated clothing before reuse.

First aid – eye contact

IF IN EYES: Rinse cautiously with clean water for several minutes, keeping eyelids open. Remove contact lenses if present and easy to do. Continue rinsing. If irritation persists, obtain medical advice.

First aid – ingestion and inhalation

IF SWALLOWED: Rinse mouth thoroughly with water. Do not induce vomiting unless instructed by a medical professional. Seek medical attention if you feel unwell.

IF INHALED: Move the person to fresh air and keep them comfortable for breathing. If coughing, breathing difficulty, dizziness or other symptoms occur, seek medical assistance.

Storage and handling

Store this product in its original closed container, in a cool, dry and well-ventilated area. Protect from extreme temperatures and direct sunlight. Keep container tightly sealed when not in use.

Avoid release to drains, natural waterways or outdoor soil. Dispose of unused product and empty containers in accordance with local regulations and the directions on the label.

Important: If medical advice is needed, keep the product label or container available. Always follow the specific instructions and safety recommendations provided by the manufacturer. This safety notice is intended as general guidance and does not replace official label directions or documentation.

Guaranteed Minimum Analysis

Total Nitrogen (N) 1.0%
Calcium (Ca) 5.0%
Total Magnesium (Mg) 1.5%
Boron (B) 0.006%
Copper (Cu) 0.004%
Total Iron (Fe) 0.1%
Total Manganese (Mn) 0.015%
Molybdenum (Mo) 0.0004%
Zinc (Zn) 0.0065%
EDTA (Chelating Agent) 0.15%
DTPA (Chelating Agent) 0.75%

Derived From

Frequently Asked Questions

Why is boron (B) essential for strong plant development, and what makes it different from other micronutrients?

Boron is essential because it stabilizes cell walls, supports root and shoot growth, and regulates sugar movement throughout the plant. What makes boron unique is its limited mobility and extremely narrow range between deficiency and excess, which causes new growth to show symptoms rapidly when levels fall out of balance.

Why is calcium important for plant growth?

Calcium is important because it builds and stabilizes plant cells as they form, acting as the structural support that keeps new growth strong and functional. Unlike other nutrients that drive color or speed of growth, calcium’s role is unique because it controls cell wall strength and membrane stability, making it essential for healthy roots, shoots, and long-term plant resilience rather than quick visual results.

Why do growers use calcium carbonate for plants instead of a fast calcium source?

Calcium carbonate is important because it supplies calcium while gently buffering acidity in the root zone, helping nutrients stay available and uptake stay consistent over time. It’s unique because it works gradually as a stabilizer, rather than acting like a quick, soluble calcium boost that can spike levels and create new imbalances.

Why is copper (Cu) important for plant growth?

Copper is important because it powers key enzymes that support energy use, tissue strength, and stress protection, and it’s unique from many other micronutrients because plants need it in tiny amounts but can be harmed quickly if copper becomes excessive.

Why is DTPA important for plant growth, and what makes it unique compared to other nutrient helpers?

DTPA is important because it keeps micronutrients like iron, zinc, and manganese dissolved and plant-available instead of getting locked up by pH and root-zone reactions, helping prevent “hidden” deficiencies. It’s unique because it doesn’t feed the plant directly—its special role is stabilizing metal micronutrients in solution, making uptake more reliable in conditions where those nutrients commonly become unavailable.

Why is EDTA chelation important for plant nutrition, and what makes it unique?

EDTA chelation is important because it helps key micronutrients stay dissolved and available for roots instead of reacting, precipitating, or becoming locked out, which prevents common deficiency symptoms like pale new growth. It’s unique because it offers dependable micronutrient stability in mildly acidic growing conditions, making it especially useful for consistent feeding when pH is already well-managed.

Why is molybdenum (Mo) important for plant growth?

Molybdenum is important because it helps plants convert nitrogen into usable building blocks for chlorophyll and growth, and it’s unique from many nutrients because it mainly supports enzyme-driven “nutrient use” rather than directly building plant tissue.

Why is total iron (Fe) important for plant growth?

Total iron (Fe) matters because iron supports chlorophyll development and plant energy systems, keeping new growth green and vigorous; it’s unique from many other nutrients because iron deficiency usually shows up first in young leaves even when older leaves stay green, since iron doesn’t easily move within the plant.

Why is total magnesium (Mg) important for plant growth?

Total magnesium is important because magnesium powers chlorophyll and energy use, helping plants stay green, turn light into growth, and use other nutrients efficiently—and it’s unique because its problems often come from nutrient balance and uptake competition, not just a simple shortage.

Why is total manganese (Mn) important for plant growth?

Total manganese matters because it supports photosynthesis and enzyme activity that keep new growth green and vigorous, and it’s unique because “total” manganese measures what’s present but not necessarily what the plant can absorb—so pH and root conditions decide whether manganese helps or harms.

Why is total nitrogen (N) important for plant growth, and what makes it different from other nutrients?

Total Nitrogen is important because it directly drives leafy growth, chlorophyll production, and overall growth speed, which sets the pace for the entire plant. It’s unique because the “total” number can include different nitrogen forms that behave differently in the root zone, meaning the same total amount can produce very different results depending on the nitrogen type and plant stage.

Why is zinc (Zn) important for plant growth?

Zinc is important because it powers key enzymes and helps regulate growth hormones, which directly controls healthy new leaves, normal internode spacing, and strong growth tips; it’s unique compared to many other micronutrients because zinc problems often show up as distorted, undersized new growth and stunting, not just simple leaf yellowing.

What does Iron DTPA do for pale new growth?

Iron DTPA keeps iron dissolved and available in the root zone so plants can build chlorophyll properly in new leaves, which is why it’s so effective for yellowing at the growing tips. It’s unique because the DTPA chelate protects iron from becoming tied up as quickly as many non-chelated sources, making it a dependable fix when pH drift or water alkalinity would otherwise cause iron lockout.

What does magnesium nitrate do for plants?

Magnesium nitrate supplies fast-available magnesium for chlorophyll and photosynthesis while also adding nitrate nitrogen that can speed up greening and growth. It’s unique because it can correct magnesium-related yellowing quickly but also changes growth momentum, so it’s most valuable when magnesium is truly limiting and the plant can safely use extra nitrate.

Safety & Technical Documents

View full details
Nutrient Feed Chart

Vegetative — CALiMAGic

Flowering — CALiMAGic

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