Ambrosia Crop Salts or Front Row Ag ?

Anyone have experienc with either two of these lines? I've researched both and they both have there advantages.
I'm trying to up my grow game in COCO Coir specifically and I don't want to go back to watered-down nutrient bottles.
Any know a dry fert that's tried and true for Coco I'm listening.thanks.
 
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