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InvisibleGnuBobo
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Casing ph buffers
    #3984309 - 03/29/05 07:35 AM (12 years, 8 months ago)

  To buffer a casing mix using peat moss, is there a large difference in the duration of the buffer's life between hydrated lime, limestone flour, and crushed oyster shells?
  I generally use hydrated lime for pasteurizing...didn't know if it worked as well as limestone for bringing the ph up and keeping it there for an extended period. 
  Thanks.  :grin:


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OfflineRogerRabbitM
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Re: Casing ph buffers [Re: GnuBobo]
    #3984485 - 03/29/05 10:14 AM (12 years, 8 months ago)

Buffers resist changes in ph. Lime is not a buffer. Gypsum is an excellent buffer. If you wish to bring the ph of your casings higher, you would want to use hydrated(water soluable) lime. Limestone is for long term use, such as in a garden. Casings, which flush for a month or so do not need long term ph adjustment. They need short term, therefore hydrated lime is what you would want to use.
RR


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OfflineFINITE1
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Re: Casing ph buffers [Re: RogerRabbit]
    #3984570 - 03/29/05 11:15 AM (12 years, 8 months ago)

Gona use Jiffy Mix myself. Has lime in it allready. Don't know if its hydrated lime or not but lime none the less.


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Offlinescatmanrav
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Re: Casing ph buffers [Re: FINITE1]
    #3984593 - 03/29/05 11:32 AM (12 years, 8 months ago)

IME, I have found that even coir/verm benifits from adding powdered oyster shells to the casing mix as a long term buffer. I believe they start working as quick as the second flush. I noticed a big difference when I stopped using it that was resolved when I started again. Havnt dealt with much peat or hydrated lime yet though...


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InvisibleGnuBobo
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Re: Casing ph buffers [Re: RogerRabbit]
    #3984806 - 03/29/05 12:57 PM (12 years, 8 months ago)

Quote:

RogerRabbit said:
Buffers resist changes in ph.  Lime is not a buffer.  Gypsum is an excellent buffer.  If you wish to bring the ph of your casings higher, you would want to use hydrated(water soluable) lime.  Limestone is for long term use, such as in a garden.  Casings, which flush for a month or so do not need long term ph adjustment.  They need short term, therefore hydrated lime is what you would want to use.
RR




Thanks.  Let me see if I understand, then.

So if I were to adjust the ph with hydrated lime, I could also put a buffer (gypsum or oyster shells) that would help keep the casing material's ph basic ~ 8.0? 

I guess it wouldn't need this buffer if I do wash off the old casing layer and re-case after each flush.  Sometimes I get lazy, tho.  :smirk:


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