---
product_id: 254799529
title: "CalMag 250 ML"
brand: "biobizz"
price: "€ 21.75"
currency: EUR
in_stock: true
reviews_count: 13
category: "Bio Bizz"
url: https://www.desertcart.fr/products/254799529-calmag-250-ml
store_origin: FR
region: France
---

# 4.2% CaO & 1.7% MgO organic formula 250 ml liquid volume 1 ml per 1 L precise dosing CalMag 250 ML

**Brand:** biobizz
**Price:** € 21.75
**Availability:** ✅ In Stock

## Summary

> 🌱 Elevate your grow game with BioBizz CalMag — because your plants deserve the best!

## Quick Answers

- **What is this?** CalMag 250 ML by biobizz
- **How much does it cost?** € 21.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/254799529-calmag-250-ml)

## Best For

- biobizz enthusiasts

## Why This Product

- Trusted biobizz brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Dosing:** Easy 1 ml per liter mix ratio ensures perfect nutrient balance every time
- • **Pure Organic Boost:** 100% certified organic calcium & magnesium for healthier, stronger plants
- • **Water Quality Savior:** Corrects Ca/Mg deficiencies in any water type—tap or reverse osmosis
- • **Versatile Growth Partner:** Optimized for both indoor and outdoor growth & flowering cycles
- • **Trusted by Pros & Hobbyists:** Highly rated with 4.6 stars from 1,481 growers worldwide

## Overview

BioBizz CalMag is a 250 ml liquid supplement delivering a precise, 100% organic blend of calcium (4.2% CaO) and magnesium (1.7% MgO) designed to correct nutrient deficiencies in all water types. Ideal for both professional and hobbyist growers, it supports robust growth and flowering indoors and outdoors with a simple 1 ml per liter dosing ratio. Trusted globally with a 4.6-star rating, it ensures healthier plants without disrupting your existing nutrient program.

## Description

Product Description Regardless of whether soft tap water or reverse osmosis water needs to be used, Biobizz Calmag offers a 100% organic and certified solution for Ca/MG deficiencies. This product brings out the most from our 100% natural ingredients and presents them in a formulation that will not alter your preferred growing program. Correct inadequate water quality and defects in a simple, controlled and natural way with Biobizz Calmag. Ingredients CaO 4.2%; MgO 1.7% Directions 1 ml to 1 litre of water Safety Warning Always wear protective gloves and eyewear when handling. Avoid contact with skin and eyes. Keep out of reach of children and pets.

Review: Great product. - Top notch prep for coir. Low odour. Great value. Great results.
Review: As described - Arrived as described and on time

## Features

- Safety data sheet available on request.
- Calmag from BioBizz is designed for the professional grower and hobbyist who needs extra calcium and magnesium in the grow.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08F22PGHH |
| Best Sellers Rank | 6,691 in Garden ( See Top 100 in Garden ) 11 in Hydroponic Nutrients & Additives |
| Brand | BioBizz |
| Brand Name | BioBizz |
| Coverage | Medium |
| Customer Reviews | 4.6 out of 5 stars 1,570 Reviews |
| Item Form | Liquid |
| Item Type Name | Biobizz CalMag |
| Item Weight | 0.31 Kilograms |
| Item form | Liquid |
| Item weight | 0.31 Kilograms |
| Liquid Volume | 250 Millilitres |
| Liquid volume | 250 Millilitres |
| Manufacturer | BioBizz |
| Mixing Ratio | 1ml pro 1 Liter Wasser |
| Model Number | BBCM0250 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | BA71 |
| Specific Uses For Product | Growth and flowering, indoor and outdoor |
| Specific uses for product | Growth and flowering, indoor and outdoor |
| Target Species | Plants |
| Unit Count | 2.5 100 ml |

## Product Details

- **Brand:** BioBizz
- **Item form:** Liquid
- **Item weight:** 0.31 Kilograms
- **Liquid volume:** 250 Millilitres
- **Specific uses for product:** Growth and flowering, indoor and outdoor

## Images

![CalMag 250 ML - Image 1](https://m.media-amazon.com/images/I/41k+2asZK4L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product.
*by S***S on 27 May 2026*

Top notch prep for coir. Low odour. Great value. Great results.

### ⭐⭐⭐⭐⭐ As described
*by M***K on 22 December 2025*

Arrived as described and on time

### ⭐⭐⭐⭐ Easy to use with good results for plants
*by C***R on 20 February 2026*

Only started to use this product a week ago mixed in Silicon, my plants are throwing out new shoots. I am only using half the recommended dose mix with silicon on and fertilisers, until I fell confident using this product. However so far my indoor plants are thriving, noticed new growth and the leaves look vibrant. Instructions are easy to follow it’s at the bottom label on the bottle.

## Frequently Bought Together

- BioBizz CalMag 250 ML
- Reductor/Bajador de pH Down para cultivo BioBizz Bio-pH- (250ml)
- BioBizz BBTPINDOOR Try.Pack - Indoor Pack,750ml

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---

*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-06-21*