Their website lists the following ingredients:
Derived From:
Fish meal, composted sea bird guano, sea kelp, spirulina, soybean protein extract, rock phosphate, potassium carbonate, magnesium carbonate, calcium carbonate, humic acid*, fulvic acid*, citric acid*, raw sugar cane*, Agrimineral 72 (silica clay extract)*, amino acids*, B-complex vitamins*, and select botanical plant extracts*.
*Non plant food ingredients

I don't see anything that will go so bad that it won't be good for the soil. It will be pretty smelly.

I'm surprised to see it used for hydroponics. With all the microbe food in that, the equipment soon would be turning black with slime.