canna

Canna CalMag Agent (1lt, 5lt 10lt)

£13.99 GBP

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Size 1lt 5lt 10lt

Quantity

CANNA CalMag Agent is a professional calcium and magnesium supplement formulated to stabilise soft water and reverse osmosis (RO) water feeding programs while preventing common calcium and magnesium deficiencies.

Designed for use in:
coco coir
hydroponics
soil
recirculating systems
RO water setups

CalMag Agent helps improve nutrient stability and supports stronger plant development throughout both vegetative growth and flowering.

Calcium plays a vital role in:
cell wall development
root health
nutrient transport

Magnesium is essential for:
chlorophyll production
photosynthesis
overall plant vitality

This balanced formula is especially useful for growers using:
soft water areas
filtered water
reverse osmosis systems
high-intensity LED grow lighting

CANNA CalMag Agent works alongside the full CANNA nutrient range and helps create a more stable feeding solution for demanding grow environments.

Key Features
• Prevents calcium and magnesium deficiencies
• Ideal for soft water and RO systems
• Supports healthier plant development
• Improves nutrient solution stability
• Helps strengthen roots and cell structure
• Enhances chlorophyll production
• Suitable for all grow media
• Works with full CANNA nutrient range

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About us

At Vireta.co.uk, we supply a wide range of quality gardening and indoor growing products, including LED grow lighting, heating solutions, water filtration systems, ventilation equipment, nutrients, propagation supplies, and plant care essentials. Every item we offer is carefully selected for performance, durability, and reliability.

With access to a large and consistently stocked distribution network, we’re able to source products quickly and dispatch orders efficiently — meaning you get what you need, when you need it. Our standard delivery window is 2–7 working days, with many items shipped sooner.

We believe in transparency and trust. There are no hidden terms and no complicated processes. Warranty is provided where applicable on electrical and mechanical products, and our hassle-free returns system ensures that any item damaged in transit or on arrival is replaced or refunded promptly.

At Vireta, our goal is to make the shopping experience straightforward, reliable, and supported by strong customer service. Whether you're a home gardener, hobbyist, or managing a larger growing setup, we’re committed to bringing you trusted brands, great value, and a smooth buying experience from start to finish.

Let customers speak for us

from 4 reviews

Decent soil with nice aeration throughout when planting the veggies

Decent soil with nice aeration throughout when planting the veggies. Smaller size helps withbad back

MR Ollive

04/26/2026

Biobizz Light Mix (Small) 20L

Perfect item and super fast delivery

C.C.

04/25/2026

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Great pots for my dahlias

Great pots for my dahlias.
Very helpful and quick customer service.
Nice surprise free gifts in the parcel which arrived promptly.
Will definitely use again - recommended.

Amanda Williams

04/10/2026