Small dark spots on leaves

[Tommy boy]

I'm going to do a run off test in a hour to try to figure out what is going on.

 

[Tommy boy]

Ok so I did a runoff test put 7.0 ro water in got 6.5 run off ph so .5 difference would that be 6.5 - .5 = 6.0? If so my soil is slightly acidic is that bad enough to have to flush? And if I do I'm in 5 gallon pots do I really need to run 15 gallons through ?

 

[v4p3r_cl0ud]

Ok so I did a runoff test put 7.0 ro water in got 6.5 run off ph so .5 difference would that be 6.5 - .5 = 6.0? If so my soil is slightly acidic is that bad enough to have to flush? And if I do I'm in 5 gallon pots do I really need to run 15 gallons through ?

I'm not exactly sure, but I believe that 6.5 runoff means your at or close to 6.5. Example: if you're soil is at 6.0 and you add 7.0 to it, in theory it should raise it somewhere closer to 7 say 6.3 or so, then when you add more 7.0 and test again you'll end up with even closer to 7, say 6.7 or so. And so on. I'm definitely no expert and someone correct me if I'm wrong.

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[Waira]

..thanks for the info,.... Ok, soil is an unknown, but likely not the issue,...
.... I see burned tips all over, did that happen earlier? Were you using the trio of nutes? Given the frequency, I'd say you've been feeding to often and heavy, which can lead to cumulative build-up and nute burn,.. might be behind the symptoms too, as this can interfere with the uptake of other nutes, including Mn,... calculation according to that method mentioned seems correct... pH at 6.0-ish is a bit too low, but not a red alert situation---

----- no need to flush, just lay off the PK boosters for now, and feed less often down the road,... skip all nutes except for the Ca-Mg totally for several days, and let the plant work off what's in there,.. as for the symptoms, Mn defc. is very rare, but it fits best... it's actually fine in lower pH for availability, but the excess P in there may be part of the uptake problem,... ideally, using a micronute supplement would be best; Earth Juice Microblast is great stuff, so score that if you can,...

 

[Tommy boy]

I started to see the nute burn after I used the beastie bloomz that stuff is really strong. The new growth seems to be ok. Should I ph my water at like 6.8 to 7.0 for a few days to get soil ph up ? I will get some earth juice microblast. And take it easy on the nutes from now on. Thanks a lot for your help and for helping everyone on here to bad u don't get paid for this it would be a full-time job lol.

 

[oldcoot]

Hey hey.
Awesome.
Looks to me like your gonna get a nice harvest.
Waira just helped me out about 2 weeks ago, awesome dude and some others too.
My problem developed close to chop too .
Glad your getting it worked out.

 

[Waira]

thanks Ol' Coot! did that girl turn out fine and dandy?

... Tommy, what's your tap water like? I ask because tap usually has some hardness to it, mineral content... the main one is CaCO3, and it's the CO3-- that's involved in pH buffering in solution,... with RO water all these are removed, as a consequence pH can swing hugely from even small inputs,... so when you pH adjust it, the actual amount of buffering capacity is very low,... hard water with significant amounts of minerals is more robust in buffering capacity, and will have stronger influence on pH,... which brings me to what Ca-mg product you have? ..many are made in part with nitrates, not just carbonates alone,... look on the label for how much N is in it, and what the ca and mg ar compounded with,... point being is yes, adjusting to 7.0 or higher is what I'd do, but if it's a weak in buffering minerals, it won't help much,.... you could also use some Potassium silicate, a great supplement I recommend for use throughout the grow,... it has several benefits -->( https://www.autoflower.org/threads/link-to-silica-benefits.47356/ ) ... but it will also raise pH,... Anyway, let me know about the water, get me a pH at least... what i really need is a TDS (ppm) or EC reading,... very handy tool sometimes! And not expensive, a decent TDS meter is about $20,... the pH will be pretty high if your water is hard,...

 

[oldcoot]

@Waira . Well buds curing. Havent tried yet but my friend loves it, coming over today for more.
I did make hash out of the trim.
Love it.
Very nice mellow head high.
Great for getting stuff done.
Very sour smell to her.
Thanks again.

 

[Tommy boy]

@Waira My tap water is 330 ppm and about 8.0 ph it's city water. My CAL-MAG has some n in it 2-0-0 it's botanicare.

 

[Tommy boy]

I used my tap water in the past but I had to use so much ph down I thought ro water would make things easier