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InvisibleOgla
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Registered: 02/16/04
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malt vs potatoe agar
    #23388928 - 06/27/16 08:05 PM (7 years, 7 months ago)

Hey guys was wondering your experiences with malt and potato dextrose agar. Whenever i use Malt agar, i get great results. This past time i decided to try potato dextrose. I noticed a big difference. With potato dextrose, the mycelium is very thin, light and almost nothing. Im wondering if theres a problem with it. Prehaps i can add sugar to give it a boost?


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InvisibleGrey
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Re: malt vs potatoe agar [Re: Ogla]
    #23388965 - 06/27/16 08:19 PM (7 years, 7 months ago)

Are you not adding honey/karo (dextrose) to your PDA?


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InvisibleOgla
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Re: malt vs potatoe agar [Re: Grey]
    #23389043 - 06/27/16 08:39 PM (7 years, 7 months ago)

not to the malt.  the malt doesnt appear to need it.  I actually never heard about it. Thou ill often add karo to dilute agar when making LC


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InvisibleGrey
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Re: malt vs potatoe agar [Re: Ogla]
    #23389067 - 06/27/16 08:45 PM (7 years, 7 months ago)

I know, malt is pretty great on its own.

I meant your potato-dextrose-agar.  Are you adding karo or honey to that?


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InvisibleOgla
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Re: malt vs potatoe agar [Re: Grey]
    #23389167 - 06/27/16 09:14 PM (7 years, 7 months ago)

no. do i need to?


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InvisibleMad Season
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Re: malt vs potatoe agar [Re: Ogla]
    #23389195 - 06/27/16 09:23 PM (7 years, 7 months ago)

Yessir. It's in most teks lol


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InvisibleGrey
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Re: malt vs potatoe agar [Re: Mad Season]
    #23389204 - 06/27/16 09:26 PM (7 years, 7 months ago)

:whathesaid: it'll help.  There's definitely an agar recipe list if you search it.  At least to get an idea.


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InvisibleCosmoKramer
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Re: malt vs potatoe agar [Re: Grey]
    #23389352 - 06/27/16 10:23 PM (7 years, 7 months ago)



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InvisibleOgla
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Re: malt vs potatoe agar [Re: CosmoKramer]
    #23394811 - 06/29/16 04:28 PM (7 years, 6 months ago)

cool. added about a bottle of karo to my mix. It increased volume by about 1/3rd and still solidified. theres a definitively noticeable glossy clear appearance to the agar.  Just gotta sterilize it now. Hoping the cook wont caramelize the Karo, but im pretty sure karo is more resistant to caramelization than honey. Thanks guys :thumbup:


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Offlinelukehighwalker710
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Re: malt vs potatoe agar [Re: Ogla]
    #23395616 - 06/29/16 09:29 PM (7 years, 6 months ago)

Quote:

losfreddy said:
cool. added about a bottle of karo to my mix. It increased volume by about 1/3rd and still solidified. theres a definitively noticeable glossy clear appearance to the agar.  Just gotta sterilize it now. Hoping the cook wont caramelize the Karo, but im pretty sure karo is more resistant to caramelization than honey. Thanks guys :thumbup:




Quote:

FastFreddy said:
Your carbon source (sugars) should be no more than a maximum 4% concentration.  Lowering this promotes faster and more rhizomorphic growth as the mycelium will actively be seeking out more nutrients rather than being saturated and unmotivated.




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InvisibleOgla
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Re: malt vs potatoe agar [Re: lukehighwalker710]
    #23395894 - 06/29/16 11:02 PM (7 years, 6 months ago)

English please?  Are you suggesting i used too much?


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Offlinelukehighwalker710
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Re: malt vs potatoe agar [Re: Ogla]
    #23395953 - 06/29/16 11:21 PM (7 years, 6 months ago)

Yes, if you're agar mix is 1/3 Karo that's far too much. It should only be at maximum 4%. I only add a couple grams (maybe a teaspoon) of honey per batch of 10 plates. You want drops of honey/Karo, not a bottle.

Edit: (added maximum)


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Edited by lukehighwalker710 (06/29/16 11:22 PM)


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InvisibleMunchauzen
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Re: malt vs potatoe agar [Re: Ogla]
    #23396556 - 06/30/16 06:49 AM (7 years, 6 months ago)

Quote:

losfreddy said:
not to the malt.  the malt doesnt appear to need it.  I actually never heard about it. Thou ill often add karo to dilute agar when making LC



yeah thats way too much sugar

for pda my recipe is:

- 1 gram honey or raw sugar
- 2 grams agar
- 3 grams potato flakes
- 1/2 cup water

also

Quote:

losfreddy said:
ill often add karo to dilute agar when making LC




I'm not sure what you mean. You add agar to an LC recipe? because that's totally unnecessary.


Edited by Munchauzen (06/30/16 06:55 AM)


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OfflineMycoLoopology
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Re: malt vs potatoe agar [Re: Munchauzen]
    #23396564 - 06/30/16 06:52 AM (7 years, 6 months ago)

maybe hes just making LC's with agar? not sure what the whole diluting would be for though. im confused, ignore me.


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