yeah, it should be as long as theres no amendments in it. All it is is just ground up coco coir.
Coco coir is actually a byproduct of the coconut fiber industry. Between the outer husk and the actual coconut is a layer of fibrous threads
But u will need to feed your plants, because this is soilless. you can do so by adding nutes to the water and mixing it you may need to adjust ph as needed and I’d suggest organic nutes