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Invisiblelone_psychonaut
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Professional vs fine grade vermiculite
    #23380199 - 06/25/16 09:51 AM (7 years, 7 months ago)

I've been looking online for some fine grade vermiculite.  I found some professional grade vermiculite on mycosupply. I can't seem to find the difference between fine and professional grade...?


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OfflineMycoLoopology
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Re: Professional vs fine grade vermiculite [Re: lone_psychonaut]
    #23380306 - 06/25/16 10:22 AM (7 years, 7 months ago)

i buy professional grade online and it works just fine. i believe it is exactly the same as fine vermiculite. though i cant be sure.


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InvisibleMoabfighter
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Re: Professional vs fine grade vermiculite [Re: MycoLoopology]
    #23380318 - 06/25/16 10:25 AM (7 years, 7 months ago)

I've never found anything locally except fine. Don't even think any of them say fine. But it's like pouring dusty grains of sugar... Very fine. Feel like my cakes would be less dense and perform better if I had some larger grain Verm.

Can anyone confirm or deny this?


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InvisibleCosmoKramer
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Re: Professional vs fine grade vermiculite [Re: Moabfighter]
    #23380343 - 06/25/16 10:31 AM (7 years, 7 months ago)

Quote:

horticultural vermiculite is available in four sizes, from 1, which is the coarsest, to 4, which is the finest. Sometimes, the grades are labeled Large (Grade 1), Medium (Grade 2), Fine (Grade 3) and Super Fine (Grade 4). Particle sizes range from 5/16 inch for Grade 1 to 0.04 inch for Grade 4. Vermiculite may expand up to 20 times its original size and hold water from 220 to 325 percent of its weight, depending on grade.




Coarse grades are recommended for PF and all other substrate mixes. So you would want grade 1 or 2. Using fine grade very is not recommended for PF tek because it compacts too much and doesn't provide the mycelium growth room to expand and connect.


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Edited by CosmoKramer (06/25/16 10:35 AM)


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Invisibledankington
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Re: Professional vs fine grade vermiculite [Re: CosmoKramer]
    #23380452 - 06/25/16 11:06 AM (7 years, 7 months ago)

:whathesaid:

However, I like the finer grade myself for using in my casing layer mix and actually to mix in my substrate too. :shrug:

To each their own I guess.


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InvisibleCosmoKramer
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Re: Professional vs fine grade vermiculite [Re: dankington]
    #23380460 - 06/25/16 11:09 AM (7 years, 7 months ago)

I fully agree finer grades can be used for top layers, casings, bulk subs ect. Just a  big pain in the ass when making cakes. They will sink down and compact when you PC them with fine grade verm. The only reason I stick with coarse or medium grade for casings and such is because it's easier to clean off of the fruits later.


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Invisiblelone_psychonaut
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Re: Professional vs fine grade vermiculite [Re: CosmoKramer]
    #23380488 - 06/25/16 11:21 AM (7 years, 7 months ago)

Thanks for the input guys. RR said fine grade has better water retention than more coarser grades, I may buy the the professional grade and see if it's fine...


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Invisiblelone_psychonaut
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Re: Professional vs fine grade vermiculite [Re: lone_psychonaut]
    #23380497 - 06/25/16 11:25 AM (7 years, 7 months ago)

I plan to use it as a bulk substrate


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OfflineMycoLoopology
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Re: Professional vs fine grade vermiculite [Re: lone_psychonaut]
    #23380498 - 06/25/16 11:26 AM (7 years, 7 months ago)

Quote:

lone_psychonaut said:
I plan to use it as a bulk substrate




in that case id say fine/professional vermiculite is exactly what youre looking for. its very fine and works great for my CVG substrates.


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Current Grow Log

^^My first grow log <3^^

Wish me luck.


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InvisibleCosmoKramer
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Re: Professional vs fine grade vermiculite [Re: MycoLoopology]
    #23380514 - 06/25/16 11:31 AM (7 years, 7 months ago)

Yes go for it! If you have coir in your bulk then it will provide enough fluff in the sub to keep it from matting down. :wink:


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Offlinespacechildo
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Re: Professional vs fine grade vermiculite [Re: lone_psychonaut]
    #23380517 - 06/25/16 11:32 AM (7 years, 7 months ago)

no one told my mushrooms they wanted coarse verm in the CVG :shrug:
size of dust/sugar sounds a bit too fine tho unless you're exaggerating.

"pro grade" sounds like a sales pitch to get your money. "prof. made for mushrooms" :rolleyes:


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