Expedited Shipping to all of Canada & USA. Express Shipping to over 154 Countries Worldwide!
Loading Data

CALiMAGic 1 Litre

by General Hydroponics

Price: $29.99 Loading Data
In stock

Achieve Optimal Plant Nutrition with CALiMAGic

Ensure Healthy Plant Growth with CALiMAGic

Enhance Plant Performance with CALiMAGic

Boost Plant Productivity with CALiMAGic

Prevent Plant Deficiencies with CALiMAGic

Loading Data
$29.99 Loading Data

CALiMAGic is an extraordinary nutrient supplement developed by General Hydroponics, which is designed to provide optimal levels of nutrition to both soil and hydroponic systems. CALiMAGic is composed of a balanced blend of Calcium and Magnesium, as well as other essential elements. When CALiMAGic is used as a supplement, it helps prevent plant deficiencies, enhances plant performance, and boosts plant productivity. The balanced blend of CALiMAGic has been proven to be effective in providing the ideal nutrient balance for healthy plant growth. Additionally, CALiMAGic is available in a variety of sizes, including 1 litre and 6 gallon containers.

Ask GaiAI

Hello, my name is GaiAI and I represent Holland Industry and the products we offer. My purpose is to provide you with information about the product you are viewing and answer any questions you may have. Please keep in mind that I am still in the research and development stages, so my responses may not always be accurate. However, I will do my best to provide you with helpful information.

Please feel free to ask me anything related to the product, and I will do my best to answer in a clear and concise manner. Additionally, if you prefer to ask your question in a particular language, I am happy to accommodate you.

Thank you for choosing Holland Industry as your go-to solution for all your growing needs. Please feel free to reach out if you require any further assistance. Our team is here to help, making your experience delightful and efficient.
bamboo stake 5 ft (25pcs/bdl) bamboo stake 5 ft (25pcs/bdl)


gaia green power bloom 2-8-4 10kg gaia green power bloom 2-8-4 10kg

$43.64 $49.99 (12.7% off)

mfgar isopropyl alcohol 99.9% 4 litres mfgar isopropyl alcohol 99.9% 4 litres


gh flora gro 4 litres gh flora gro 4 litres


floraseries quart trial pack floraseries quart trial pack


gh floralicious plus 500 ml gh floralicious plus 500 ml


net pot 5 inch net pot 5 inch


hydroclay premium clay pellets 10 litres hydroclay premium clay pellets 10 litres


flora blend 4 litres flora blend 4 litres


general hydroponics go box general hydroponics go box


gh general organics bioweed 1 litre gh general organics bioweed 1 litre


liquid koolbloom 4 litres liquid koolbloom 4 litres


diamond nectar 10 litres diamond nectar 10 litres


gh armor si 10 litres gh armor si 10 litres


gh general organics camg+ gallon gh general organics camg+ gallon


gh flora gro 208l gh flora gro 208l


gh rapidstart 4 liters gh rapidstart 4 liters


gh general organics bioroot 10 litres gh general organics bioroot 10 litres


gh general organic biomarine 10 litres gh general organic biomarine 10 litres


Product details
Product Dimension: 20.32 x 20.32 x 15.24 cm
Shipping Weight: 1.36 Kg
SKU: 1216

Manufacturer: General Hydroponics

Date first available: March 03 2015
Average customer review: 4.6 out of 5 stars 6252 customer reviews
Bestsellers Rank: #2 in General Hydroponics

Christopher Pinto


Verified Purchase

June 17, 2020

From starting the growth stage with only water, adding CALiMAGic made a whole major difference in growth immediately after a few days of feeding! I was amazed! I’m sold on General Hydroponics Products!

Alexandre M.


Verified Purchase

Product = blessing from above! However packaging/seal = 0

February 24, 2020

The product itself works absolutly great !
But the fact that the seal was broken once again (second time out or 3) is kind of pissing me off. I estimate around 150-250ml missing.
Like i said i strongly defend the godly product but the reason of 3 stars is like i said, packaging /seal have issues which i absorb from my own pocket once again

Will update review and stars eventually or i ever get a follow up on that from seller , hopefully.


Michael Dumoulin


Verified Purchase

This Bottle Will Last Months, or Years Watering Several Plants.

August 04, 2019

This solution is very concentrated. 1 ml per liter is the mix ratio. So this 950 ml bottle will mix 950 liters of water. Almost 200 gallons. I think that's a lot. Works in ANY medium(soil, coco, hydroponic). With proper care, this will help you get to the top of your gardening goals.Plants are 17 days since germinating. No deficiencies here!



Verified Purchase

Good Calcium and Magnesium source

January 28, 2017

If you get yellow edges on the leaves or mottled yellow/green spots it is likely a magnesium deficiency. If you have small wrinkled leaves, it is likely a calcium deficiency. This product fixes both of these problems. If you don't need calcium you can use epson salt for the magnesium.

ryan pongracz


Verified Purchase

Best of the best

September 08, 2020

The best growers use this stuff, swear by this stuff, and they more I researched the more I believe it. Hands down the go to for any calcium magnesium nutrition for your plants. Many people buy full lines of nutrients and still add this because it works so well on its own even.



Verified Purchase

Excited to try on tomatoes and cannabis

August 14, 2020

I’ve read this product is great for tomatoes and cannabis. Have never tried it. I’ve had trouble finding information on when to start using it on your plants and for how long, not the dosage. It had leaked just a bit but was sealed in plastic so box didn’t get wet.



Verified Purchase

big difference in plants

September 19, 2019

I use in hydroponics and it makes a big difference for me as I am on town water and the building I live in has a water filter that filters out some minerals. I also use it on my outdoor tomato plants and it has pretty much eliminated bottom rot that I get without it



Verified Purchase

The small Sticker on the the bottle seal

June 07, 2021

I contacted the actual company (General Hydroponics) and they notified me that the seal on this bottle is specifically this way so that the content can breath since the conetent's chemistry is different from other series.

Jeremy Smith


Verified Purchase

Seal on bottle broke.

June 16, 2019

Be careful buying liquid nutrients online. Out of the 3 times I've ordered them, 2 of those the seals on the bottles broke and spilled all over the box. I never lost a ton, but still a bit wasteful.

Devonté S.


Verified Purchase

A must for COCO growers !

January 31, 2020

Does what it’s supposed to, im a intermediate grower and using coco, the demand for Cal-mag in coco is high then soil and my ladys are loving it, had couple yellow spot but now there gone

1 2 3 4 5 6 7 ... [9] >