Grotek Cal-Max

Quick Answer

Grotek Cal-Max 2-0-0 is a liquid calcium, magnesium and chelated iron supplement for hydroponic and soilless growing. It is formulated for deficiency correction, coco-coir pre-charging and use during periods of rapid growth, high temperature or high humidity. Apply only at the label rate for your growing method.

Product Description

Cal-Max supplies readily available nitrogen and magnesium to support chlorophyll and protein development, while calcium supports plant vigour during peak growth. Chelated iron provides additional support where nutrient imbalance, rapid growth or environmental conditions contribute to minor deficiencies. It can be applied through the root zone or as a foliar spray.

Key Features

• Guaranteed analysis: 2.0% total nitrogen, 3.0% calcium, 1.0% magnesium and 0.1% chelated iron
• Designed for hydroponic and soilless systems, including peat and coco
• Suitable for use as a root drench or foliar spray
• Useful for pre-charging coco coir
• Suitable for vegetative and flowering phases

Available Sizes

• 500 mL
• 1 L
• 4 L
• 10 L

Select the required size above. The supplied bottle size matches the selected variant.

Specifications

Package Contents

• 1 × Grotek Cal-Max bottle in the selected size

Directions for Use

1. Shake well before use.
2. Soil/soilless: Mix 5 mL per 4 L of water. Use as required.
3. Water culture: Mix 5–8 mL per 4 L of water. Use as required.
4. Foliar: Mix 10 mL per 4 L of water. Use as required.

One litre makes up to 800 litres of solution at the 5 mL per 4 L rate. Follow the product label and adjust the rest of the nutrient program as appropriate.

Care, Storage and Safety

• Keep the container tightly closed in a dry, cool and well-ventilated place.
• Wear protective gloves, protective clothing and eye/face protection when handling.
• Avoid contact with skin and eyes, and wash exposed skin thoroughly after handling.
• Keep out of reach of children.
• For spills, first aid and disposal guidance, consult the current Grotek safety data sheet.

Buyer FAQs

What is Grotek Cal-Max used for?

It supplies calcium, magnesium, nitrogen and chelated iron to support plants affected by common minor nutrient deficiencies and to help charge coco-coir media.

Can I use it in hydroponics?

Yes. For water culture, the manufacturer specifies 5–8 mL per 4 L of water, used as required.

Can it be used as a foliar spray?

Yes. The manufacturer specifies 10 mL per 4 L of water for foliar application, used as required.

Is it suitable for coco coir?

Yes. Grotek identifies Cal-Max as suitable for soilless media and for pre-charging coco coir.

Which size should I choose?

Choose 500 mL or 1 L for smaller programs, or 4 L and 10 L where more solution is required. The mixing rate remains the same.