doesn't seem anything too major, do you measure the moisture in the soil (there a meters on e-bay, very inexpensive, could be too much watering, did you read about that problem? this is pretty common, i think. with my hydro systems, i don't really deal with that. I've had my share of brown leaves, as we were discussing sometime back. brown leaves could be because of the ending of the life cycle, expected, you just have to keep it monitored, you can cut off the yellow leaves, some say its a good idea, and if they get worse, post again, someone will have another suggestion