The kinda hydro they were most likely talking about is known as beasters, or chemical drenched garbage, that tastes like as when smoked. The grower skips a few processes (such as flushing the nutes and fertilizer from the roots before harvesting) and the final product is very bad for you. The best way to tell if its properly grown bud is try to snap the stem on the bud, if it breaks easy its good stuff, if it bends don't buy that shit