According to friends at Humboldt nutrients, the main need for the carbs (molases) are for food for the mycorrhizal/ bacterium to ferment. If growing in Coco the environment is much more conducive to perpetuation of these beneficials.

In Hydro I use a container with lid, with several 1/8th inch holes in the top and bottom. I fill the container with Hydroton pellets and put all the carbs and benies in there and it becomes a perpetual innoculant...just add molases. Everytime I change the reserviour I just put more molases in the container and replace it into the clean nutes thus perpetually fermenting the innoculants.

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Here it comes!~ The age of light without heat!