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OfflineSankhara
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Re: Cultivation General Discussion [Re: Schemenhaft] * 1
    #27091572 - 12/16/20 05:01 AM (3 years, 1 month ago)

Nah, I believe it has something to do with different kind of nutrients. But it could be due to contaminants present as well. Maybe someone with a LOT more experience than us could share their experience if its happened to them :wink:

I am doing brf agar and im just pouring boiling water over the agar brf mixture, i suspect MAYBE it has something to do with not boiling for long enough and most of my brf sinks to the bottom of the cup? I dont know...

I'll have to try with boiling for longer or just using grain water and see if that solves the problem


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OfflineCelestialexplorer1
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Re: Cultivation General Discussion [Re: Sankhara]
    #27091673 - 12/16/20 07:25 AM (3 years, 1 month ago)

I don’t know why they wouldn’t pack flow hoods better. 1/4 ply or styrofoam or something. Mine came damaged as well.


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InvisibleModularMind
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Re: Cultivation General Discussion [Re: Celestialexplorer1]
    #27091779 - 12/16/20 08:48 AM (3 years, 1 month ago)

Given the disappointing experiences of more than enough folks, when having filters delivered, I have every intention of inspecting mine while picking up locally.

I’m trying to determine if I want/need to go the ULPA route.
I’m also curious why the same size HEPA costs more.

Having trouble determining the requisite blower as I’m not sure if the “Recommended Final Resistance” of 1.0” w.c. is the figure needed, but it’s the only one listed.
Oh well.
If I can’t figure it out, I’ll never have to spend the money.








https://www.grainger.com/mobile/product/AIR-HANDLER-ULPA-Air-Filter-2EJY4


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Invisiblesandman420
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Re: Cultivation General Discussion [Re: ModularMind]
    #27091847 - 12/16/20 09:37 AM (3 years, 1 month ago)

Final resistance is twice the starting resistance typically, it is when the filter is considered used up and loaded too much to continue using.


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- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Invisiblesandman420
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Re: Cultivation General Discussion [Re: sandman420]
    #27091851 - 12/16/20 09:41 AM (3 years, 1 month ago)

It is actually counterintuitively harder to filter out 0.3 micron size particles than it is to filter out 0.12 micron size particles. HEPA is actually best for a flow hood.

see https://www.hepacart.com/blog/ulpa-filter-vs.-hepa-filter-whats-the-difference-why-does-it-matter


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- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: sandman420]
    #27091857 - 12/16/20 09:47 AM (3 years, 1 month ago)

Quote:

sandman420 said:
It is actually counterintuitively harder to filter out 0.3 micron size particles than it is to filter out 1.2 micron size particles. HEPA is actually best for a flow hood.

see https://www.hepacart.com/blog/ulpa-filter-vs.-hepa-filter-whats-the-difference-why-does-it-matter





You got that wrong actually sandman.

ULPA filter down to .12 micrometer not 1.2 where as hepa filter down to .3

ULPA usually have a higher efficiency rating too. Like hepa only needs 99.97% to be
considered good enough for clean rooms. ULPA usually has an efficiency of no less than 99.999%

I scoped your link and see where it says 1.2 micrometer for ulpa but I guarantee that is a typo

Edit: in fact they have a little widget or whatever and it says .12 for ulpa
so whoever wrote that article accidentally typed 1.2 instead of .12


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Edited by natedawgnow (12/16/20 09:58 AM)


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Invisiblesandman420
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Re: Cultivation General Discussion [Re: natedawgnow]
    #27091860 - 12/16/20 09:48 AM (3 years, 1 month ago)

i had mistyped the first one but the info was correct except the decimal


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Invisiblesandman420
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Re: Cultivation General Discussion [Re: sandman420]
    #27091863 - 12/16/20 09:50 AM (3 years, 1 month ago)

ULPA is less effective at 0.3 micron than a HEPA counterintuitively.

It is only 99.999999999 at 0.12 micron size which is easier to handle than 0.3 micron if you read.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: sandman420]
    #27091864 - 12/16/20 09:50 AM (3 years, 1 month ago)

The decimal can mean the difference between life and death in some scenarios:spank:


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: natedawgnow]
    #27091867 - 12/16/20 09:52 AM (3 years, 1 month ago)

The article clearly says ulpa is better at trapping particles in the .12-.4 range.

The only reason they use hepa is because, for their applications, ulpa isnt necessary.

Doesnt mean it isnt better. Dont be mad I called out a mistake in an article you posted


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: natedawgnow]
    #27091873 - 12/16/20 09:56 AM (3 years, 1 month ago)

Quote:

While ULPA filters collect more particles in that hard-to-trap 0.12-0.4 range, they are only necessary for specialized applications such as microelectronics manufacturing or medical laboratories, removing particulates from cleanrooms, or filtering toxic surgical plumes emitted during electro-surgical operations.




Thats from your link. They just cost more and not everyone is trying to filter viral particles


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Invisiblesandman420
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Re: Cultivation General Discussion [Re: natedawgnow]
    #27091876 - 12/16/20 09:59 AM (3 years, 1 month ago)

Quote:

HEPA filters, by contrast, are much more broadly used because they're considered optimal for most biological applications, including healthcare. As an example of why HEPA filters work so well in hospitals, consider that viruses, which are smaller than 0.3 micrometers and theoretically could pass through a HEPA filter, most often travel on larger particles such as saliva or sweat, thereby being trapped.




--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: sandman420]
    #27091882 - 12/16/20 10:02 AM (3 years, 1 month ago)

Ya so healthcare assumes viral particles travel on larger particles.

That doesnt mean that ulpa is less efficient which your original comment implied.
They especially dont only filter down to 1.2 micron like the article mistakenly says and you originally repeated.

I was just trying to set a record straight.


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Invisiblesandman420
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Re: Cultivation General Discussion [Re: natedawgnow]
    #27091884 - 12/16/20 10:04 AM (3 years, 1 month ago)

Listen let me spell it out for you since you are obviously a little dense.

Ulpa is more effective at 0.12-0.4 range.

HOWEVER SMALLER PARTICLES OFTEN RIDE ON BIGGER PARTICLES WHICH THE ULPA IS SHITTIER AT

So if you are trying to filter out bigger than 0.4 particles, WHICH WE ARE, a hepa is what you want


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: sandman420]
    #27091890 - 12/16/20 10:09 AM (3 years, 1 month ago)

Dude thats not what your article says.

It says that ulpa are denser so they dont produce as many air exchanges/hr
so they dont work well for clean room application or hepa applications since
they dont filter the air as quickly. They absolutely filter larger and smaller particles more efficiently.

Down to .12micron means everything above .12 DOWN TO .12 fucking duh

You really trying to tell me that a denser material capable of filtering doen to
.12 micron cant filter a .5 micron particle? Read your own damn article


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Edited by natedawgnow (12/16/20 10:11 AM)


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Invisiblesandman420
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Re: Cultivation General Discussion [Re: natedawgnow]
    #27091893 - 12/16/20 10:11 AM (3 years, 1 month ago)

Yes thats what I am saying. 0.5 micron goes through the ULPA filter more than a HEPA filter

Quote:

t's because, in this case, "better" is only true in a narrowly-defined sense. While ULPA filters collect more particles in that hard-to-trap 0.12-0.4 range, they are only necessary for specialized applications such as microelectronics manufacturing or medical laboratories, removing particulates from cleanrooms, or filtering toxic surgical plumes emitted during electro-surgical operations.




the ulpa are specially designed to trap the hard to get small particles. It works on a different princeiple than fucking pore size man.


--------------------
- Sandbag Tek - How To Sterilize Spawn Bags - All About Static Pressure / Pressure Drop for DIY Flow Hoods - Sandman's LC Tek-

Marijuanaut escapes earth to cultivate - Grow-room is church temple of the new stoner breed


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: sandman420]
    #27091894 - 12/16/20 10:12 AM (3 years, 1 month ago)

Bro again your quote does not validate your thinking but whatever. It'll hopefully click for you soon


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OfflineGrinchGrower
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Re: Cultivation General Discussion [Re: sandman420]
    #27091898 - 12/16/20 10:13 AM (3 years, 1 month ago)

This doesn't sound logically correct...
If a filter is rated for small particles then by design it would trap larger particles just as efficiently.


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: natedawgnow]
    #27091901 - 12/16/20 10:14 AM (3 years, 1 month ago)

Your quote is saying although it filters in the .12-.4 range.... because
hepas dont filter in that range at all.

Ulpas absolutely filter larger particles too. Sorry but youre wrong.


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Invisiblenatedawgnow
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Re: Cultivation General Discussion [Re: GrinchGrower]
    #27091902 - 12/16/20 10:15 AM (3 years, 1 month ago)

Quote:

GrinchGrower said:
This doesn't sound logically correct...
If a filter is rated for small particles then by design it would trap larger particles just as efficiently.



Ya no duh right but I'm the dense one :lol:


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