Biobizz CAL-MAG 20L

Correct Calcium and Magnesium Deficiencies With Biobizz CAL-MAG, 20 L

Calcium and magnesium are secondary macronutrients that play essential roles in plant cell structure, photosynthesis, and enzyme function. Deficiencies in either element — visible as interveinal chlorosis, tip burn, or weak stems — are common in controlled growing environments, particularly when growers use soft tap water or water that has been treated by reverse osmosis (RO) systems. Both soft water and RO water lack the mineral content that provides natural background levels of Ca and Mg.

Biobizz CAL-MAG is a plant-based calcium and magnesium supplement formulated to address this gap without adding harsh synthetic salts or chemical stabilizers. It integrates with the Biobizz feeding program without disrupting nutrient balance or pH stability, and can be used alongside other Biobizz fertilizers during the regular watering schedule.

Key Features & Benefits

• Plant-based formula — derived from natural plant-based sources rather than synthetic mineral salts — consistent with the Biobizz organic growing approach.
• Corrects Ca/Mg deficiencies — provides supplemental calcium and magnesium to address the deficiencies common when using soft tap water or reverse osmosis-filtered water.
• No harsh synthetic salts — formulated without the harsh synthetic salts used in conventional Ca/Mg supplements — compatible with organic and nature-oriented growing systems.
• Integrates with Biobizz program — mixes directly with prepared Biobizz nutrient solutions without disrupting the existing nutrient balance.
• 20 L volume — available in 20-liter for high-volume and commercial growing operations.

Who Should Use Biobizz CAL-MAG (20 L)

Growers using Biobizz products with soft tap water or RO-filtered water who are experiencing calcium or magnesium deficiencies — particularly those running coco, soilless, or hydroponic systems where Ca/Mg buffering from the substrate is limited.

When to Add CAL-MAG to Your Feeding Routine

Add CAL-MAG to your nutrient solution whenever your water source is soft or RO-filtered, or when plants show signs of Ca/Mg deficiency (interveinal yellowing of younger leaves, tip burn, or weak stems). Mix CAL-MAG with water first before adding other Biobizz fertilizers. Follow the Biobizz official Nutrient Schedule for dosing guidance specific to your substrate and program.

Frequently Asked Questions

Why do soft water and RO water cause calcium and magnesium deficiencies?

Hard tap water naturally contains calcium and magnesium carbonate minerals that provide a baseline level of both nutrients. Soft water and RO-filtered water have these minerals removed or significantly reduced, leaving the plant dependent on the nutrient solution alone for Ca and Mg supply. CAL-MAG restores this supply without using harsh synthetic mineral salts.

Can I use CAL-MAG with all Biobizz substrates and fertilizers?

Yes — Biobizz CAL-MAG is formulated to integrate with the Biobizz feeding program across substrates including soil, soilless, coco, and hydroponic systems. Mix CAL-MAG into your water before adding other nutrients. Follow the Biobizz Nutrient Schedule for dosing rates specific to your substrate.

What deficiency symptoms indicate I need to add CAL-MAG?

Calcium deficiency typically shows as tip burn, browning leaf margins, and stunted new growth. Magnesium deficiency shows as interveinal chlorosis — yellowing between the leaf veins while the veins themselves remain green — often starting on older lower leaves. Either symptom in a soft or RO water setup suggests adding CAL-MAG to the feeding routine.

Is Biobizz CAL-MAG suitable for hydroponic systems?

Yes — CAL-MAG is compatible with hydroponic systems, including those where calcium and magnesium are not supplied by the substrate. In inert hydroponic media where the plant relies entirely on the nutrient solution for mineral supply, CAL-MAG can be an important addition to prevent deficiency.