pics of my plant w/nute lockout? hi/low ph?

[mattbury]

my plant is having a nute lockout problem i assume. can someone tell me if this is from a high or low ph. 1/3 perilite 2/3 miracle grow soil. fed mostly r/o water with some tap water sometimes.pure blend pro bloom formula.for more info please check out my grow log below. i would appreciate the help sooooo much!!
PLEASE HELP MY PLANT .

http://boards.cannabis.com/showthrea...=1#post1164674

mattbury Reviewed by mattbury on 12-31-2006. pics of my plant w/nute lockout? hi/low ph? my plant is having a nute lockout problem i assume. can someone tell me if this is from a high or low ph. 1/3 perilite 2/3 miracle grow soil. fed mostly r/o water with some tap water sometimes.pure blend pro bloom formula.for more info please check out my grow log below. i would appreciate the help sooooo much!! PLEASE HELP MY PLANT . http://boards.cannabis.com/showthread.php?p=1164674&posted=1#post1164674 Rating: 5

[Uppen]

My addvice would be get a PH meter today....NOW. A basic one like this would do.http://cgi.ebay.co.uk/NEW-Digital-Mi...QQcmdZViewItem Though there are more just look around.
If the plant is in trouble better to get the cure asap. Baking soda or vinegar will alter the PH if u cant get PHup/down

[Uppen]

.
If the plant is in trouble better to get the cure asap. Baking soda or vinegar will alter the PH if u cant get PHup/down

Dont do anything 'till u have a meter though.

[five0addict]

looks like normal yellowing and veg leaf loss in that stage of flower. i doubt a ph problem started outa nowhere.
what size pot you got?
how long you been in 12/12?

[mattbury]

its in a #3 container. i think it holds about 1.75 gallons. its ~41 days 12/12. i doubt its normal yellowing of the leaves cause its got lots of spots and a few of the leaves went from nice healthy dark leaves to crispy and dead in just a few days.

can i get ph testers locally anywhere? if the local hydro store has any they are probably the expensive testers.guess i need to give them a call. if i buy one online it might take up a week to get here.
would this one be any good, its only $7.95 .
http://www.discounthydroponic.com/Im...tester-500.jpg

[Uppen]

You really want to get a digital one that measures to +/- 0.1 PH. The one you pictured dosn't look accurate enough. If u cant get one locally i recommend you buy online. It may take a week to arrive but at least you have it for next time. And if u have spare cash use the $7.95 one as a rough guide untill a good one arrives.
Keep the water @ 6.5-6.7 PH

[ValkyrieAg]

are you positive the soil is toxic? Run water through the medium to clear it. Its possible that it needs nutrients too. Do you think its over ferted or underferted? You only have about 2 weeks before you harvest anyway.

[mattbury]

are you positive the soil is toxic? Run water through the medium to clear it. Its possible that it needs nutrients too. Do you think its over ferted or underferted? You only have about 2 weeks before you harvest anyway.

i cut more holes and ran some water thru it the other night. before there was a white dust which would be calcium deposits on the soil and container at the bottom. now that i have cut more holes into the bottom and raised the container off the plate and flushed it out im hoping it doesnt progress much further. it has affected most of the upper and mid section fan leafs, the small leafs closer to the buds havent been affected as much or at all and the lower fan leaves arent affected. hmmmmm

[stinkyattic]

MG preferted soil... RO water... yikes... there's the culprit!!!
did you know that tap water that has calcium in it can actually help prevent a precipitous drop in pH from toxic salt buildup? Calcium Carbonate, or CaCO3, limestone, is a neutralizing agent for acids!
I honestly think that using RO water is not a good idea. Especially if you are not adding CalMag plus! That's very important... you have to replace the Calcium and Magnesium if you use RO or distilled. And a calcium deficiency can cause weird blotches and necrosis like you have.

[stinkyattic]

before there was a white dust which would be calcium deposits on the soil and container at the bottom.

I doubt that was calcium, but rather salt precipitate from your liquid ferts interacting with the ferts in the dirt.