Here is your problems in order. 1-Overwatered, water every 2-3 days, not every 6-8 hours, airate the soil 2-4 in down with a stick or pen, they will perk up in a day or two. 2-containers too small, they will get root bound if they arent allready. 3-too much Nutes, use 15-30-15 maybe once a...