Hey whats up ya Im almost certain that you have a Mg deficiancy Id get some cal mag and see if that helps,also looks like there being over waterd? Do you let your soil dry out in between waterings?,do you have holes in your buckets? also for future grows i would advise not to go with a mirical grow medium especialy if you add other nutes that time release soil can cause other issues if your not carefull go with eather Foxfarm or Roots or something like that,I use Roots Organic and Its great stuff around 16 bucks for a 30 pund bag I know its alil more than the mg but ull have better results and taste in the end,plus its hard to flush a soil with time release nutes, well hope ive helped take care