Okay so it started a week or so ago on the very bottom leaves. It starts with little brown spots near the tips of the leave that slowly take over it and then it turns yellow/dies. I'm not sure if its a deficiency or what. It's a hydroponic ebb and flow system. I keep my ph at 5.6 and it floats up to about 5.8 - 5.9 before i readjust it everyday. It's also at about 350 ppms and im using distilled water. Anyone have any clue?? I dont want my baby to die! Here are some pics.