WeddingCheeseCakeAuto MarsHydrofc3000

Should also aim for 6.5 ph. 6 is the low point. And your ec at 3400 may be a tad high unless your ppm is read with truncheon instead of hanna

Your ec being 3.3 might be the problem, autoflowers don't usually like going past Ec 1.6 plus she is coming to end of life so she will be using all energy on bud production. Good luck

How do you calibrate? 7 then 4 and that's it?, or 7 and 4 until you don't have to adjust either one when put into the 2 solutions? A lot of people calibrate the 7 then the 4 and think their done calibrating. If you had to make changes on the 4 after you adjusted the 7, then the 7 will need readjusting. Do this until you have no more adjusting from either 7 or 4