TGB i feel your pain bro....
..im a coco grower soil alludes me so im no help..:dunno: sorry man ...i can tell you that from my experience i have to agree with Medi ...and your run off i maybe high do to evaporation but once again im a coco grower

TGB i feel your pain bro......im a coco grower soil alludes me so im no help..:dunno: sorry man ...i can tell you that from my experience i have to agree with Medi ...and your run off i maybe high do to evaporation but once again im a coco grower
I wouldn't worry too much about a few bottom leaves turning yellow.It could be low on nitrogen so I would try and get her a little higher dose and see if she greens up.Also keep giving her cal/mag at every feeding.It takes a few days for your nutes to kick in so just relax and see what happens.I would also try and lower your intake ph a little to 6.4 or 6.5.
Think Different is a pretty resilient strain and for 31 days she's looking good bro... I'd guess your phenotype is the 11/12 week version cuz it preflowered in week 4.. mine didn't preflower till week 8 she went 14 weeks. She's almost at week 5 bro and you might be underfeeding her N if you're following the 15 week dutch pro schedule.. their week 5 is 2.5ml A/2.5ml B of Grow if she was gonna go 15 weeks. But don't follow their 18 hour/16/18/16/14 light schedule.. never seen that before.. I think it could hurt yield cuz of less light, but idk.
Evening, GB!:tiphat:
I'm with Nam and Medi, give her some time. Don't be tempted to over-correct, it doesn't work any better on plants than it does with cars.
Nam kinda echoed my Pm, try to hit between 6.4 and 6.5 with your water and feed, and monitor your run off. I think her top growth is looking much better, but that's just looking at the pics.
Yellow fans... well, they do that on even the healthiest plants. Watch, but take some deep healing breaths. :Ohmmm.......:
I think skip foward one week so instead of the 2.5ml each AB bump up to the 3ml..
Just a thought, GB, I like splitting my feed schedules so every watering has a dose in it. So if I water twice a week, it's two half doses, instead of one big one. That lets me tweak things... a little more here, a little less there, and if I'm going too hot maybe just some cal/mag or a shot of molasses in pH'ed water.
That's the cool thing about growing, Brother. No one way is the only way. Like my Nana used to say, "Don't be afraid to take that thing out and play with it". Oh, wait, that wasn't granny....
I've had great luck using GA's pH chart to figure out where I need to be:
PH Calculation Guide by GoAuto6
Rough Calculation Guide:
Here's some good info on ph.....
If your runoff pH is higher than your starting pH, use this equation to determine your soil pH:*
Soil pH = Runoff pH + Difference
If your runoff pH is lower than your starting pH, us this equation:
Soil pH = Runoff pH - Difference.
For example, say your the starting pH of your solution before it goes in is 6.5 and the pH of your runoff is 7.0. The difference is +0.5, so using the above equation:
Soil pH = 7.0 + 0.5*
Soil pH = 7.5
If your starting pH is 6.5 and your runoff is 6.0, your difference is -0.5 and using the above equation:
Soil pH = 6.0 - 0.5
Soil pH = 5.5