Coco advise

Hi guys
I live in a place that I can't find any grow products so I order them from eu .after my products arrived I realize that I can't find even a good coco medium !!!!! they give me something that I don't know what the f@ck is inside this shit and no name.. So how I can understand if it is good or not?i have AN coco nutriens ...

Do a slurry test to get the ph and ec of the coco. Ph should be between 5.5 - 6 and the lower the ec the better. What brand of coco is it?