try this... if they are in the veg state flush the soil and make sure it drains out thoroughly. leave your light schedule the same, turn on a fan in your grow area and let the soil dry out for a few days. after that stick your finger in the soil every 2 days, if it feels wet or when you pck the pot up and it feels heavy, chances are there is planty of water, if the soil feels dry about a quarter of the way down into the soil or the pot feels extremely light then dose it with some water! just repeat this process if it happens again.