Indoor PH Problems When Flowering Begins

[stashmouth]

Ketchie-
I think you are right on all counts. Lower the ph of the water going in until you get around 6.3 in run off.
I think you're right about the baking soda, but I have no experience with it.

You probably have a cal-mag def since the RO water has almost 0 ppm. It's probably not a ph lockout.
My best guess based on 3 months of experience. I use OF and have dealt with Mag def during my grow. Check the link in my signature if you want to compare.
Best of luck...

 

[JM]

als when you look at the ph chart ou can see if your ph is up at 6.8 ish you're locking out magnesium... try adding a tsp / gallon of epsom salts to your watering 1x a week in addition to controlling ph better...

 

[JM]

https://www.autoflower.org/f7/announcements.html

see links above as well... especially self diagnose thread

 

[stashmouth]

I told you help would come in a hurry! It doesn't get any better than JM. His words are gospel round here.

 

[JM]

I'm honored... thanks mate! :thumbs:

 

[ketchieshoobie]

Thanks for the fast responses!

I don't take pictures for paranoid reasons

The more I think about it and the more I hear from you guys the more I think it is a Cal-Mag deficiency because of the RO water. I will add epsom salts to the water more often and return to my original 6.2-6.4 water ph.

I'll report back the results.

KS

 

[JM]

np mate... sounds like that will cure your issue...

like the avatar....

i say i say i say boy..... hehehe

 

[ketchieshoobie]

I miss watching Looney Tunes with a buzz on lazy college afternoons... I almost coughed out a lung a few times laughing so hard.

 

[TokinNuggs]

I would agree with Stash above about using RO water and OF . I had all sorts of problems using filtered tap water, and with my auto, the same issues when flowering started, around week 3.5-4, with distilled water.

I am now using bottled spring water, and adjusting it to 6.4-6.6 with or without nutes, as I was told the PPM/micro nutes in it, would help.

So far, so good.

I would also check to see how bubbling your water affects your PH - when I did that - my PH would take a huge jump up in PH, until after I let it sit out overnight or for a few hours, then it would drop back down dramatically. So I just quit doing it.

 

[JM]

epsoms for magnesium and molasses for calcium... molasses 1 tsp / gal 1x a week

ph your water.... then bubble it... ph will read high but when the oxygen is released it falls back to prior to bubbling.. :thumbs: