Grotek Cal Max - 500 ML

Grotek Cal-Max™ is a deficiency correction supplement for restoring mineral support and green growth when plants show common minor nutrient deficiencies, especially in coir-based growing.

Cal-Max™ is built to help bring plants back when deficiencies show up from nutrient imbalance, rapid growth, or overly humid conditions. It’s a practical choice for growers who want a focused nutrient deficiency corrector that supports a healthier-looking canopy while reinforcing the root zone. The available nitrogen in this formula supports chlorophyll and protein production, helping re-green plants that are running low on nitrogen and struggling to keep up with demand.

For coir-based soils and coco blends, Cal-Max™ is positioned as an excellent option for pre-charging coco coir and supporting a more balanced medium. Coco can have its own inherent imbalance, and this product is designed to assist in buffering those challenges with a strong calcium source and fast-acting mineral support. If your goal is steadier performance from coir-based growing, Cal-Max™ targets the kind of root-zone conditioning that helps plants stay vigorous during active growth.

Cal-Max™ also supports plant vigor and plant strength in periods of peak growth, when calcium can become a limiting factor. The formula is described as being designed to drive calcium movement, which is especially relevant during high temperatures and high humidity, when plants may struggle to take up enough calcium even when it’s present in the medium. Alongside calcium support, chelated iron adds deficiency-fighting power for lush green growth, reinforcing leaf color and overall plant performance during demanding conditions.

This product is suitable across vegetative and flowering phases and is listed for hydroponics as well as soilless (peat/coco) systems. It is also suitable for foliar application when faster recovery from nutrient deficiencies is the priority. Cal-Max™ fits growers who want a direct, mineral-focused solution for deficiency correction without turning their nutrient program into a complicated overhaul.

Cal-Max™ is derived from calcium nitrate, calcium chloride, magnesium nitrate, and iron EDTA, providing targeted support centered on calcium, magnesium, nitrogen, and chelated iron. This is a good fit for growers working in hydroponics or peat/coco media who want dependable deficiency correction, improved vigor through peak growth, and stronger green growth when conditions make uptake more challenging.

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.