Watering and run off

drop your ph to berween 5.8-6.0 and screw the runoff

dude my runoff from my green poison was over 3000 ppm and just realizing my dumbass didn't even check the ph. that would have been a good idea to see. because to be honest in my big living soil pots i rarely check my run off only my input ph of whatever solution um using. i thought i was watering my indoor plants in my 65 gallons enough. but she took 12 gallon before i got runoff other day. i was scared to put that much water because normally they take maybe 8 gallons but once i did more it flushed it out and she started to pray out of the taco shes had. shes also huge so idkevn know my other plants are fine with same inputs. and i think that ready was also due to also just top dressing. just like other things that should be causing problems my plants out in my greenhouse got up to 105 degrees and 95 percent humidity for days and their unbothered...if your plants are not doing to bad i wouldn't worry about it too much

It's gotta be a matter of volatility of measuring runoff in addition to anything else. pH scale is logrithmic. so a "9" is significantly more alkaline than a "6.3" is acidic by an order of magnitude. if you measure at start vs later on in runnoff, you'll get different values more times than not, so that may be part of this -- the baked-in inaccuracy of trying to measure this. solutes left on your drip tray could impact it too... it's an imprecise thing to start. plants do selectively 'transport' some molecules more than others, which can cause a shift in pH around the roots which could impact what you measure in runoff, too. There's enough water if you don't feel burdened by how frequently you have to irrigate. Does it last at least 1-3 days before dryback requires the 'next' irrigation? a few moving parts to that quesetion that i assume you'll fill in... how much dryback you want is variable to some extent, etc. In a 'super soil' should you be getting so much runoff? I think that's just leaching off your amended nutes. Some minimal runoff to ensure full saturation is fine, but unlike soilless, the rurnoff isn't serving a function (unless dealing with a toxicity and diluting the soil is the goal). It won't hurt, but may force you to supplement fertilizer sooner - which may or may not be a concern. As far as reacting to the pH, i'd ask more questions.. how is the growth rate and overall health of the plant? Even if you haven't used this super soil before, you still have a familiarity of fast vs slow growth and the like. If you can't notice a problem, i'd be patient about it. I'd still try to ph-balance the water i add to bring it down, but i wouldn't do anything more drastic that could strip the soil of its nutrients. would need more info.. if you use it again and same thing results... maybe the super soil isn't constitute in an optimal way for a plant that prefers slightly acidic soil. Or, maybe, it is irrelevant if you have fast growing plants, proper yields and overall health seed to harvest.... if other metrics are great, then it's a a tiny problem at worst. I could be wrong, but 9.4--9.7 should be causing problems... if not it could be a false positive due to some other factor warping the measurement but not necessarily what the roots are experiencing. again, it's not a linear scale. 9 is much more alkaline than 8. Pushing 10 i'd assume would lock out micronutes et al in an obvious way.

Something is off, there should not be such swing. Maybe your ph is normalizing, because 9.0 or so is not good 4sure. Keep tracking. My favorite range is 6.3-6.5 in soil. 10% counts as good run off target ...