I use Advanced Carboload. I agree with Mutt that pH swings a bit right after I change my res. However, I do have denser flowers this time around then previous. Also I am not sure if the pertains to Mass' post but I did notice this time that my plants root system was not nearly as large as before. I am wondering that feeding the Carbs in conjunction with the beneficials I use have made it easier for my plants to uptake nutes. I feel this in turn has kept the plants from need to expand their root structure in search of more ways to absorb nutes faster. This is all a quess that I have made from the observations I have made this grow.