PH regulation

[Kmakok]

This is still the same case that ive placed on many threads.
Flowering 5th week. 2 plants suddenly DRY out. I thought it was the ballaster, that was burning them, but now i firmly believe it is the tapwater that made soil WAY too acid. Im trying to get a ph meter, but i will have to wait 2-3 days to get it so i need a solution NOW because 2 other plants are starting to have the same signs as the ones that died.

I need to make something before i get the ph meter or this will be chaos (prolly lose 4 plants if not).
How could i raise the ph so that it reaches aprox 6.8?
I know that right now i need to fill the troubleshooting thing, BUT its stupid because io dont really have PH of the soil.
How much calcium carbonate-limestone- do i need to add so that i change the PH? (make it higher)Should it be added to the water? (i will try to get a water source of aprox 6.5)or in the soil?

[Dutch Pimp]

if? it was me?...I'd mix some water with powdered lime. I never done that because I've never had acid soil...but, if I did...I would.

very small amount...you want to raise ph....SLOWLY

[Kmakok]

How much limestone per liter of water too raise it slowly? Please help fast. 1 more plant got attacked by the same problem :(:(:(:(

[mattas]

ph up is what you want, but if you dont know the ph level you
wont know how much to raise it by

[Kmakok]

How much water/limestone(calcium carbonate) do i need to mix? or just place the powder on top of the soil and then add water? How long does it take to change the ph?(will it slowly change every day?or takes a loong time?)

If it takes a long time i believe im dead.... (took 2 days to one of the chiks to TOTALLY dry out) :mad:

Tomorrow il try to get a pH meter

[Dutch Pimp]

If ...your positive it's the tap water causing the low PH? I would add a tablespoon of powdered lime to a gallon of water and mix well.

...and I wouldn't drink that water, either....:)...I wouldn't even wash my clothes in it.

[Kmakok]

Well as i saw a pic of a plant with Phosphorus deficciency. I took some pics so that you can tell me what you think. im SPECULATING (till i get ph-meter) that the 2 possible problems are
1. Ph
2. Phosphorus defficiency (SEVERE)

The first picture is the one i found on the net and is a phosphorus deff plant.
http://i39.tinypic.com/2jb323m.jpg

This one is from a plant that has been totally attacked by the sickness.(took 3 days to become like this so i have to act FAST)
http://i41.tinypic.com/2i2315k.jpg

This one is from a leaf from a starting-to-get-sick plant
http://i44.tinypic.com/op8s4k.jpg

Do you believe its a P deff?Or some other nute deff?
BTW: I am sooo stressed by this :S

[headshake]

are any of those from your actual plant?


-shake

[Kmakok]

yes. the last two. The first pic i just found it on the net so that you have a reference for P deff.

[headshake]

any luck with a pH test kit/meter?

did your leaves turn a deep, dark green/blue first? phosphorus deficiencies show in older leaves first. they can show brown or purple spots.

just my 2 cents. i'm sure one of the experts will be around shortly.


-shake

if that happened in three days i don't think it's a P deficiency.

[Mr. Clandestine]

What's that gray powdery stuff on top of the soil? It almost looks like bone meal, but I can't tell for sure.

And we can't really give you advice on what to do for your pH when you aren't sure what your pH is. I think I remember responding to another one of your threads recently, and you said that sawdust was added to the soil. I'm not sure if you did that to aerate the soil or if the soil happened to already have sawdust in it, but that can make the soil acidic. That's not saying that it will, because other things, such as water pH and other amendments in the soil have the potential to balance things out, as well as make problems worse. It's impossible to know without having even a remote idea what your pH is like. Nutrients get locked out when pH is at one extreme or another, so if this is the case, you'll need to fix your pH before you try correcting a nutrient deficiency... otherwise you'll just end up making the problems worse.

I'm not sure that you'll be able to save the plant pictured in your second link. Dutch Pimp is right, if it is a pH problem, you'd have to bring it back to normal levels gradually, not all at once, or you'd just shock the hell out of the plant and probably kill it anyway. And I wouldn't recommend flushing since you don't know the pH of your water, your soil doesn't look like it drains very well, and soaking wet conditions aren't going to improve matters.

Fill this out as best as you possibly can: Troubleshooting Form (http://boards.cannabis.com/plant-problems/127058-troubleshooting-form-yay-you-know-you-wanted-one.html). And get a reading on the pH of your water and your soil runoff as quick as you possibly can. Again, I can't say with certainty that the second plant you pictured is going to make it, even if you already were taking measures to fix the problem. It looks pretty rough. But hey, we've all had to learn from our mistakes before, and now you'll have a better idea how not to end up in this position again.

Sorry I couldn't be more help.