Grow hydroponic grow mediums do affect speed of growth, Botanicare who makes both hydroton clay pebbles and cocogro has this pic in their grow room of these two plants at 2 weeks of age, one in hydroton clay pebbles and one in cocogro and the one in cocogro is bigger! Thats not the only one though, go to botanicare.net and then to their grow room all the ones in cocogro are growing faster. I think we can officially say that cocogrow is a faster grow medium. I didn't say better so don't be like "oh claypebbles have blahblah better drainage blah." Peace.
[attachment=o90677]