Your res temp is pretty warm. How do your roots look? 75 is the beginning of the danger zone for res temps, so if you aren't providing tons of air, the roots will rot and that will stifle your bud production for sure. Been there many times myself .

Also, if your res temp is 75, your air temp is probably pretty high as well, which can cause slowed growth. I would get a thermometer/hygrometer combo, they are around $30.

Other than that your PPM is pretty high as I already said, I'd lower to around 800 for a week and see if they bounce back.

Good luck!
dejayou30 Reviewed by dejayou30 on . problem, buds stopped growing. help. i am at the begining of week 6 from starting 12/12 and everything was looking great untill about 2 weeks ago the buds seem to have stopped bulking up, and some stunted leaves are growing out from the tops of some. from some of the research i have done it seems i may have nute locked my girls. i am using botanicare bloom, calmag and karma, and my ppms have been around 1300-1500. in the last while i have found it quite hard to balance my pH levels it seems to dive to 4.5. just today i have done a Rating: 5