What’s Runoff PH supposed to be?
I went go Transplant my plant today And she seemed flimsy. So I decided against it. I went to LST instead and it was like training a wet noodle.
She didn’t perk up after a Few hours.
She didn’t seem too thirsty, but I gave her a drink anyways to measure the runoff.
Runoff PPM was 240, PH was 5.7. Her leaves are wilting slightly. Color is good.
The water she’s getting is 6.5-6.6. PPM around 850-900
One piece of info I left out, this is a soil grow, FFOF. I’m in week 8 of Veg.
My thoughts, fwiw.
In soil you should have runoff pH between 6.3 and 6.8. As you are getting closer to flowering I would want to favor ~6.5. Being on the higher end of the scale helps P and K uptake during flowering and I try to run mine at 6.5 when in flower.
I assume you haven’t been feeding much up to this point. If you haven’t then salt buildup isn’t the issue. I would run several gallons of higher pHed (~7.3 or 7.4) water through to run up pH. It usually works for me. If you are in the low 6.x range it’s probably okay and you can continue to pH up your feedings/waterings going forward to run pH up to the desired range slowly. Be sure to pH tap water if adjusting the way I said above (running a few gallons through.) It’s impossible to properly pH RO or distilled water since the ions have nothing to hold on to.
Running a few gallons through will tank your PPM too. I always put a dose of light nutes in the last gallon I put through. Feed as normal on your next watering.
@MidwestGuy has you covered 
@MidwestGuy should I do a sledgehammer flush?
I wouldn’t with PPM so low.