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Offlinefrankwhite85
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When are wet SFD's problematic?
    #23842885 - 11/17/16 06:09 PM (7 years, 2 months ago)

RR once posted "If you put a wet filter on a jar, it will remain wet in the PC and after. Molds and bacteria will colonize right through the wet filter from the air to your grains below"

but many cultivators never use foil to cover their lids when they pc and say they have no problems.  Is it only a problem if the filter has already dried and moisture inside of the jar gets the filter wet? or maybe if you've used the filter past its expiration and the increased pore size is problematic with water


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OfflineThe Mycologist
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Re: When are wet SFD's problematic? [Re: frankwhite85]
    #23842890 - 11/17/16 06:10 PM (7 years, 2 months ago)

I thought I saw something that RR wrote saying to wet the filters before pc run to ensure all the nasties are killed.


--------------------
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Offlinefrankwhite85
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Re: When are wet SFD's problematic? [Re: The Mycologist]
    #23842903 - 11/17/16 06:14 PM (7 years, 2 months ago)

I read that too! there's so much conflicting information in his posts its crazy.  Like when he said SFD's are infinitely reusable but that advice makes everyone run for the hills now.


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OfflineKenetic
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Re: When are wet SFD's problematic? [Re: frankwhite85]
    #23843343 - 11/17/16 08:25 PM (7 years, 2 months ago)

I'd say they are problematic if they remain wet for an extended period of time after the pc cycle.  The filters usually dry soon after the cycle though.


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Offlinefrankwhite85
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Re: When are wet SFD's problematic? [Re: Kenetic]
    #23843368 - 11/17/16 08:35 PM (7 years, 2 months ago)

like if you just let it sit with foil on it and didn't use it? and is there really a difference if u use it dry or hydrate it like RR mentioned before using?


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OfflineKenetic
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Re: When are wet SFD's problematic? [Re: frankwhite85]
    #23843396 - 11/17/16 08:42 PM (7 years, 2 months ago)

I've never wet the filter before the pc but I can definitely see why rr (or anyone) would suggest it. 
I've actually never seen any of my filters wet after the pc cycle but I pc at night and use the jars the next day.  they are always dry by then, and I remove the foil right before I inoculate.  I imagine if you left the foil on indefinitely that could keep the filters wet, but I can't think of any other reason.


--------------------
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Re: When are wet SFD's problematic? [Re: frankwhite85] * 1
    #23843520 - 11/17/16 09:21 PM (7 years, 2 months ago)

Quote:

frankwhite85 said:
I read that too! there's so much conflicting information in his posts its crazy.  Like when he said SFD's are infinitely reusable but that advice makes everyone run for the hills now.





Make enough posts overy the course of a decade or more and you might find some things you said years ago are no longer what you agree with. That's why we encourage people to use the post date function when doing research.


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Offlinefrankwhite85
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Re: When are wet SFD's problematic? [Re: Pastywhyte]
    #23843670 - 11/17/16 10:17 PM (7 years, 2 months ago)

So do you dunk or leave your SFD's dry when you PC?


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Offlineenlightenment
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Re: When are wet SFD's problematic? [Re: frankwhite85]
    #23843877 - 11/18/16 12:09 AM (7 years, 2 months ago)

I do not use SFDs but if they are wet for too long they can get colonized by contams. That's why I would not wet them.

Quote:

blindingleaf said:
i've posted about SFD failures….



pretty sure I even said that faulty filter discs are my biggest vector for mold a couple weeks ago.





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Offlinefrankwhite85
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Re: When are wet SFD's problematic? [Re: enlightenment]
    #23843920 - 11/18/16 12:40 AM (7 years, 2 months ago)

Do you use tyvek instead?


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Offlineenlightenment
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Re: When are wet SFD's problematic? [Re: frankwhite85]
    #23843940 - 11/18/16 12:57 AM (7 years, 2 months ago)

I use .22 PTFE filter stickers.


I had great success with polyfill when i had no stickers around.

Some people use a combination of tyvek and micropore tape.

micropore tape only works for some people but I also read a lot of failure. The latest post I read about micropore tape was a success story by using 4 layers.

SFDs work and last some time. If you want to safe some money you can cut them and glue them on your lids with silicone. Someone wrote that it is not recommended to cut SFDs but it definitely works.

I opened a thread about lids some weeks ago.
It might be helpful.


Edited by enlightenment (11/18/16 01:04 AM)


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OfflinecronicrFacebook
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Re: When are wet SFD's problematic? [Re: enlightenment]
    #23843961 - 11/18/16 01:12 AM (7 years, 2 months ago)

When they are cellulose n not synthetic


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Offlinefrankwhite85
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Re: When are wet SFD's problematic? [Re: enlightenment]
    #23843962 - 11/18/16 01:13 AM (7 years, 2 months ago)

what if you used a filter sticker and a SFD together? would that restrict ge too much? I did sfd with micropore tape once it worked great


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Offlineenlightenment
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Re: When are wet SFD's problematic? [Re: cronicr]
    #23843966 - 11/18/16 01:21 AM (7 years, 2 months ago)

Quote:

cronicr said:
When they are cellulose n not synthetic




IMO synthetic disks can get colonized too.
Polyfill is synthetic but can get colonized by mold if it was used too often. The steam forces some "nutritious steam" through the filter and makes the synthetic material able to get colonized.

I think that's the main problem about filters. If you regularly rinse or change them they should work fine.


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Re: When are wet SFD's problematic? [Re: enlightenment]
    #23843972 - 11/18/16 01:25 AM (7 years, 2 months ago)

Synthetic will not stay wet unlike cellulose filters.


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Offlineenlightenment
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Re: When are wet SFD's problematic? [Re: cronicr]
    #23843990 - 11/18/16 01:41 AM (7 years, 2 months ago)

OK. That's a big advantage of synthetic disks if they are hydrophobic or don't hold moisture for too much time.

PTFE stickers are hydrophobic, too.
Polyfill (PE) is also hydrophobic but the PE fibers can hold nutritious moisture long enough to get colonized.

Colonization of filter material does not happen often but it is possible.


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Offlinefrankwhite85
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Re: When are wet SFD's problematic? [Re: enlightenment]
    #23844010 - 11/18/16 02:16 AM (7 years, 2 months ago)

So for sfd's would you recommend hydrating the disk or doing a bleach solution soak before each round of pc'ing then toss the disk once its had about 30 runs?  What if you used sfd and PTFE stickers together?


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Offlinewtfcrazymofo
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Re: When are wet SFD's problematic? [Re: frankwhite85]
    #23844017 - 11/18/16 02:24 AM (7 years, 2 months ago)

No the pc cycle takes care of it. Just pick one.  SFD's can't stay wet.  Your spawn run room should not be higher than 50% rh.


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Invisiblemorty422
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Re: When are wet SFD's problematic? [Re: wtfcrazymofo]
    #23844040 - 11/18/16 02:45 AM (7 years, 2 months ago)

Why bleach before sterilization?


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Invisibleblindingleaf
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Re: When are wet SFD's problematic? [Re: Pastywhyte]
    #23844046 - 11/18/16 02:50 AM (7 years, 2 months ago)

Quote:

Pastywhyte said:
Make enough posts overy the course of a decade or more and you might find some things you said years ago are no longer what you agree with. That's why we encourage people to use the post date function when doing research.




:whathesaid:

i still use SFD's,both synthetic and cellulose, and encourage people to do the same. once they start getting older, just watch them.  unfortunately, its one of those things u don't find out until its too late.  when I said its my biggest mold vector, I didn't mean that I get mold frequently b/c of filters. I just meant that now that I know what Im doing, and have been doing it for a while, sterile procedures are no longer my biggest vector (i still fuck up with it tho, just not as much).  its usually something small, like a pinhole in a bag or a faulty filter disc.

no matter what kind of filter:
-i use foil on lid inPC
-i do not bleach or clean the filters after the jar is used
-i check the perimeter of the disc and the center where it covers the GE holes for fraying/damage


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