AN Carboload is simply Glucose and Xylose, you are not going to get any benefits if you are in hydro/coco/inert medium - except if you are in a living soil, you can substitute similar sugars if necessary. You can buy a truck load of Glucose for piss cheap. Half of the AN products can be purchased for 1/100th of the price they sell their overpriced nutrients for.
A classic example is AN Big Bud - it's simply Monopotassium Phosphate and Potassium Sulfate, both are generally easily-accessible nutrients from most fertilizer companies.