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Invisiblepoboy
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Peat moss ph nightmare *DELETED*
    #4222291 - 05/26/05 01:42 PM (12 years, 1 month ago)

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Reason for deletion: d



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Invisibleagar
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Re: Peat moss ph nightmare [Re: poboy]
    #4222445 - 05/26/05 02:19 PM (12 years, 1 month ago)

Use hydrated lime (water soluable) to start off with. WARNING, this is HOT STUFF.

Once you have it at the 7.5 to 8 stage, then add a bit of limestone powder, for a long term buffer.


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Offlinescatmanrav
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Re: Peat moss ph nightmare [Re: poboy]
    #4222448 - 05/26/05 02:20 PM (12 years, 1 month ago)

You tried using a long term buffer short term. Limestone isnt water soluable, if you want short term pH change to 7, you need to use HYDRATED lime. Then add 5% limestone powder to the neutral peat moss to break down over time as mycelium secretes its acidic wastes.


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"life is like a drop of rain getting closer and closer to falling into a lake, and then when you hit the lake there is no more rain drop, only the lake."

Growing with bags, start to finish (including my new grain and substrate prep)
Anyone looking to start bulk tubs/mono tubs/shotgun hybrids? Good tubs to use..
How I do grain (old still good tips)
Turn your closet into a fruiting chamber
Casing layer colonization and overlay


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Offlinelepiota
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Re: Peat moss ph nightmare [Re: scatmanrav]
    #4222996 - 05/26/05 04:36 PM (12 years, 1 month ago)

i have pure white marble powder available, will it work like limestone as a long term buffer? marble is CaCO3 in a crystallyzed form


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Invisiblepoboy
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Re: Peat moss ph nightmare *DELETED* [Re: agar]
    #4223549 - 05/26/05 07:17 PM (12 years, 1 month ago)

Post deleted by poboy

Reason for deletion: d



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Offlinegrow
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Re: Peat moss ph nightmare [Re: poboy]
    #4223580 - 05/26/05 07:26 PM (12 years, 1 month ago)

has to be hydrated lime I believe. IDK for I haven't tried pickling lime


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InvisibleLouiseLouise
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Re: Peat moss ph nightmare [Re: poboy]
    #4223612 - 05/26/05 07:32 PM (12 years, 1 month ago)

"Hi-Yield" is a common brand name. Most hardware stores with a garden center carry this. It says "To sweeten the soil" on the bag.

peace


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OfflineCaptAmazing
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Re: Peat moss ph nightmare [Re: LouiseLouise]
    #4225092 - 05/27/05 02:55 AM (12 years, 1 month ago)

Garden lime works fine too, which makes sense because thats what it was designed to do. Your main mistake is worrying too much about pH of peatmoss. I've made plenty of casings without lime or any pH neutralisation and they work fine.


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Invisibleagar
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Re: Peat moss ph nightmare [Re: CaptAmazing]
    #4225283 - 05/27/05 04:06 AM (12 years, 1 month ago)

Quote:

CaptAmazing said:
Garden lime works fine too, which makes sense because thats what it was designed to do. Your main mistake is worrying too much about pH of peatmoss. I've made plenty of casings without lime or any pH neutralisation and they work fine.




Casing material pH & why it is important.

"pH", is a measure to describe the acidity of a medium. pH 7 is neutral; higher means alkaline, lower acidic.

Peat is a major constituent of preferred casing mixes. The pH of peat is variable, dependent on the source it came from. Meaning, the pH of peat differs from various sources.

The preferred pH range of a casing mixture is 6.5 to 8. 7.5 is optimal. Peat is acidic. Consequently, to achieve an optimal pH range of a casing mix, the pH of the casing mixture must be adjusted accordingly (within the range of 6.5 to 8).

The pH of the casing must be within certain limits to support strong mycelial growth. An overly acidic or alkaline casing mixture will depress mycelial growth and supports unwanted competitors.

It is generally easier to make casing materials more alkaline (i.e., increasing the pH) than it is to make them more acid (i.e., reducing the pH).

A movement of 0.5 is easy but, because the pH scale is logarithmic, a movement on the order of, 2.0 points becomes more difficult because there is a factor of 10x between each full point, so pH 5.0 is actually 100 times more acid than pH 7.0.

There are several common types of lime available for use, though care should be exercised with all of the products. Lime is caustic and a skin and eye irritant and can be dangerous if misused. If you choose to use such products, carefully read and follow all manufacturer directions exactly. The major types of lime products include:

Hydrated Lime: fast acting, but not long lasting. It is very effective to produce a fast change in pH level. It is also the "strongest" form of lime generally available, and you must follow all manufacturer precautions, since your skin and eyes can be easily irritated or burned if the product is misused.

Ground Limestone: a naturally occurring type of limestone that has been ground to a fine powder. How quickly it will act to modify pH and how long it will persist depends on how finely it was ground.

Generally, ground limestone is weaker than hydrated lime, needing about 30% more to raise the pH by the same amount. It has the advantage, however, of usually being significantly cheaper than the hydrated lime, and usually works more slowly and lasts much longer.

Mixed Lime: usually sold under a brand name. Most brands contain a variety of particle sizes to provide some immediate benefits, as well as a longer persistence. (this is often referred to as "time released" lime).

pH gradually falls to less than optimal by the end of cropping due to acids secreted by the mushroom mycelium. Consequently, a long lasting buffering agent is preferable.

If you wish to achieve optimal results, when adjusting pH? It is highly advisable to use litmus strips (with color chart), or acquire a pH test probe (available at most garden supply stores, under $20) to accurately test, and adjust the pH of your casing mix, prior to application.

Doing all other cultivation steps properly. Then, applying a casing mixture outside the proper pH range, most often creates poor cropping results.


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