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OfflinePick
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Ventilation for monotubs, filtered or not?
    #16128703 - 04/23/12 02:03 PM (11 years, 9 months ago)

Hello everyone.

When I see photos or descriptions of plastic storage bins that have been fashioned into monotubs, ventilation is usually facilitated either by perforating the entire tub with a lot of small holes, or more often, by a small number of big holes that are clogged with something like synthetic pillow stuffing. The idea of the latter seems to be that there should be filtered gas exchange, even during the fruiting stage. But the lids of these bins don’t make a hermetic seal. Pressure differentials will mostly be relieved threw the large gap between the brim of the bin and its lid, anyway. And besides, by this time in the process, maintaining a sterile environment becomes extremely impractical, and from what I understand, increasingly unnecessary. How superior could this really be to just drilling in a bunch of little holes, and leaving it at that?


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OfflineRetrovertigo
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Re: Ventilation for monotubs, filtered or not? [Re: Pick]
    #16128722 - 04/23/12 02:10 PM (11 years, 9 months ago)

mono tubs don't have lots of little holes...shotgun terrariums do...do more research kid you will get the hang of it


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OfflineSoreSpore

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Re: Ventilation for monotubs, filtered or not? [Re: Retrovertigo]
    #16128751 - 04/23/12 02:16 PM (11 years, 9 months ago)

You address an interesting dilema veteran monotub growers run into, and that is the lids. Getting a perfect seal is vital to some, while individuals often prefer one tub size and design over another. I do my monotubs like no one else on here and have great success. You will find your niche.

The concept of a monotub is to relequish heavy CO2 gases out of the bottom holes, while creating a vacuum to draw fresh air through the top holes.


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Offlinemyco99
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Re: Ventilation for monotubs, filtered or not? [Re: Retrovertigo]
    #16128761 - 04/23/12 02:19 PM (11 years, 9 months ago)

Generally speaking monotubs do not have many little holes, but they can function like that.  See my mini monotub thread from a few years ago: http://www.shroomery.org/forums/showflat.php/Number/12126661#12126661

While large holes stuffed with polyfill are definitely the norm around here, if you have a clean room you can basically make your monotub like a SGFC and have no issues.  This is how I do mine simply because it's faster than using polyfill, once you have drilled all the holes.

[EDIT] The above statement presupposes your holes start above the substrate, not below it or on the bottom of the tub.

That said, for maximum cleanliness one should definitely use polyfill.


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Edited by myco99 (04/23/12 02:21 PM)


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InvisibleTranscendingLife
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Re: Ventilation for monotubs, filtered or not? [Re: myco99]
    #16128829 - 04/23/12 02:41 PM (11 years, 9 months ago)

The polyfil in monotub holes during the Fruiting Process is not for filtering the air entering the monotub.
It's for limiting FAE & keeping RH up.
Many alter their poly density/thickness depending on their individual needs.
I use extremely loose poly (almost falling out) w/ a small desk fan circulating air for FAE.

The "monotubs" you've seen w/ tons of little holes are SGFC modded into Monotubs.

Lastly, you've probably seen monotubs in colonization that have polyfil stuffed in the holes.
That's for GE just like you would on grain jars.
IMHO&Experience, I prefer to tape the holes shut for colonization & use the lid for GE.


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Offlinemyco99
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Re: Ventilation for monotubs, filtered or not? [Re: TranscendingLife]
    #16132296 - 04/24/12 08:28 AM (11 years, 9 months ago)

I beg to differ.  A SGFC has many holes around the entire surface area.  A monotub employing many holes only above the substrate is similar to a SGFC, but not necessarily the same.  Moreover, a monotub of such design is not necessarily a modified SGFC if the builder's original purpose and intent is to create a monotub.

This debate centers on the definitions we use as a community, but these definitions grow over time as new methods are introduced.  Monstermitch's original monotub had large holes and polyfill, so that became the operating definition for 'monotub'.  However, changes made by others to the original monotub (nod to Doc) have expanded its definition, in my view.


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143/0x63/99...It's like watching the mycelium grow...
WARNING: You must be 21 years of age to experience hallucinations.


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InvisibleTranscendingLife
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Re: Ventilation for monotubs, filtered or not? [Re: myco99]
    #16132419 - 04/24/12 09:15 AM (11 years, 9 months ago)

Good point.
I remember Morelman making a modified monotub w/ a triangular hole pattern of 1/4" holes.


https://www.shroomery.org/forums/showflat.php/Number/13964061


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AMU: We Quickly Answer Questions Here
"One must accept the probability of failure to experience the elation of success." - TranscendingLife
“A man of genius makes no mistakes; his errors are volitional and are the portals of discovery.” - James Joyce
:sporedrop::sporedrop::mushroomgrow::sporedrop::sporedrop::wow:How I Do EVERYTHING:wow::sporedrop::sporedrop::mushroomgrow::sporedrop::sporedrop:
"Your vision will become clear only when you can look into your own heart…. Who looks outside, dreams; who looks inside, awakes."- Carl Jung
"Anything that can be done chemically can be done by other means."- William S. Burroughs
"You are as dead now as you will ever be" - Seth


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