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Calcium Magnesium Supplement boosters
Do I need a Calcium Magnesium Supplement?
Your plants will tell you if they are in need of it.
If you are using a good nutrient and good water and fresh quality coco, there should not be any need for Cal-Mag.
Some strains of plant will need it despite everyone's best nutrient designs...
A lot of growers using Coco Coir growing media will need a supplement.
particularly if
- you use a cheap coco which isn't buffered sufficiently or designed for Hydroponics
- you are reusing your coco so the buffering is no longer in the media
See https://www.canna.com.au/info-courier_calcium and https://www.canna.com.au/info-courier_magnesium for an in-depth look at these deficiencies.
What Cal-Mag supplement should I use?
We recommend Grow research Calcium Magnesium supplement as it is easiest to use at 1ml per litre.
However most brands will be sufficient for your needs.

Flairform CMX 5L Calcium Magnesium and iron additi
$140.00
or 4 payments of $35.00 with
Info