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Offlinespud303
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Casing with EXTREME bases
    #3765146 - 02/11/05 03:29 AM (11 years, 9 months ago)

I've read a few casing teks, and I've notived that a basic layer is generally good, if for nothing than avoiding contamination on the very otp of the casing. I've read of using oyster shells, chalk, or lime, but because of my situation, cant utilize these, I do however, happen to have a quantity of Sodium Hydroxide.
Could I use my NaOH to basify my casing? I'm not sure if it would work and dont want to destroy what i have with a silly mistake.

So, can i safely use the NaOH, or should i just wait until i can find a better source of basification (is that a word?)?


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Offlinespud303
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Re: Casing with EXTREME bases [Re: spud303]
    #3771556 - 02/12/05 06:40 PM (11 years, 9 months ago)

bump?


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InvisibleHolydiver
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Re: Casing with EXTREME bases [Re: spud303]
    #3771569 - 02/12/05 06:43 PM (11 years, 9 months ago)

Hey,

The word you're looking for is "alkalinity". Basic >>>> alkaline. I'm not sure about NaOH. What is your casing material anyways?

-D


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InvisibleDamn_Skippy
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Re: Casing with EXTREME bases [Re: Holydiver]
    #3771666 - 02/12/05 07:16 PM (11 years, 9 months ago)

sodium hydroxide is a super strong base. Now, I'm a noob at mycology but I know a bit about chemistry. Here is my theory from what I have read here.

in casings you want to create a buffer with limestone, chalk, or shells. these are mildly alkaline or basic. Just enough to offset the PH or even make it slightly basic. However, A REALLY STRONG base like NaOH will offset the PH to make the casing extremely basic/alkaline and this can lead to the same problems as if the casing was acidic.

Also, the NaOH could be so basic that it has the same effects as bleach(ClNaO) and kill your mycelium

I'm not saying "don't use the sodium hydroxide". I think this would make for a great experiment, but if you do use it, use it very sparingly


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Offlinespud303
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Re: Casing with EXTREME bases [Re: Damn_Skippy]
    #3775485 - 02/13/05 08:43 PM (11 years, 9 months ago)

I am preparing a 50/50 verm/coco coir casing layer. I think im going to opt to not include any NaOH for fear that it will be too harsh, even in adjusted levels for the mycelium to tolerate.
Thanks for the clarification and feedback


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Invisiblederx
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Re: Casing with EXTREME bases [Re: spud303]
    #3775498 - 02/13/05 08:46 PM (11 years, 9 months ago)

definetly no NaOH, no no no, it is not a buffer, it is a base only! You need only slightly alkaline buffer additions to balance the pH over long periods of time. I'm sure you understand, good luck!


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InvisibleDamn_Skippy
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Re: Casing with EXTREME bases [Re: derx]
    #3776079 - 02/13/05 11:02 PM (11 years, 9 months ago)

Quote:

derx said:
definetly no NaOH, no no no, it is not a buffer, it is a base only! You need only slightly alkaline buffer additions to balance the pH over long periods of time. I'm sure you understand, good luck!



a buffer is a solution not a molecule. NaOH can be used as a buffer in certain solutions. The effectiveness of it, depends on acidity the solution. Just because NaOH is "a base only" doesn't make it unpratical molecule to create a buffer.

now is it unpratical to use NaOH in this case? probably. it having similar polar qualities to bleach will probably kill myc.


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"I like cigarettes, Miss Taggart. I like to think of fire held in a man's hand. Fire, a dangerous force, tamed at his fingertips. I often wonder about the hours when a man sits alone, watching the smoke of a cigarette, thinking. I wonder what great things have come alive from such hours. When a man thinks, there is a spot of fire alive in his mind---and it is proper that he should have the burning point of a cigarette as his one expression."


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Re: Casing with EXTREME bases [Re: Damn_Skippy]
    #3776250 - 02/13/05 11:36 PM (11 years, 9 months ago)

NaOH wouldn't balance the addition of hydroxide ions, that is why i said it is not a buffer. I guess it's how someone interprets the defintion, but I believe for a solution to be a buffer it must balance both the addition of H+ and OH- ions, not simply just one, but I see where you're coming from. In most cases, weak acids/bases are used as buffers, not strong ones such as NaOH.


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OVERGROW the government!!

it's not a war on drugs, it's a war on personal freedom, ok, thats what it is.


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OfflineTinTree
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Re: Casing with EXTREME bases [Re: spud303]
    #4825702 - 10/19/05 05:35 PM (11 years, 1 month ago)

SWIM used a ~1% H202 solution to buffer his casing way back in the day. You don't need to worry too much about a high pH (this doesn't mean go crazy dumping strong, undiluted bases all over your casing)... the main reason to keep the pH above 7 is that green mold loves low pHs. Mycelium tolerates high pHs just fine (this is why bleach dunks work).


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Re: Casing with EXTREME bases [Re: TinTree]
    #4825842 - 10/19/05 05:58 PM (11 years, 1 month ago)

to buffer ur casing, just use put like 15 egg shells in the oven for like 10 mins at 350deg and grind them in a plastic bag.


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Re: Casing with EXTREME bases [Re: tristan1018]
    #4828276 - 10/20/05 04:38 AM (11 years, 1 month ago)

It could be used. Hydrated lime also is not a buffer and can be used. Problem is how much? peat varies in acidity just like hydrated lime does, this sparks debate as to how much to use. Bluehelix was saying Ryche Hawk recommends far too much hydrated lime, but maybe Ryches lime was relatively weak, and his peat was very acidic.
You really need a ph tester. I recommend a ph of 8-8.5 since it helps keep green mold away


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