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Invisibleloladoreen
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Petri dish
    #28007115 - 10/19/22 09:13 PM (2 years, 2 months ago)

Why do you need to wrap your Petri dishes?


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Offlinecozmyc
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Re: Petri dish [Re: loladoreen] * 1
    #28007117 - 10/19/22 09:14 PM (2 years, 2 months ago)

To keep moisture in and contam out :mushroom2:


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Invisiblebakedbeings
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Re: Petri dish [Re: loladoreen]
    #28007119 - 10/19/22 09:15 PM (2 years, 2 months ago)

:whathesaid:


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OfflineRusty2096
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Re: Petri dish [Re: loladoreen]
    #28007120 - 10/19/22 09:15 PM (2 years, 2 months ago)

Petri dish lids don't have a tight fit when closed. Contam would sneak in if not wrapped.


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OfflineJaksavage
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Re: Petri dish [Re: loladoreen] * 2
    #28007126 - 10/19/22 09:17 PM (2 years, 2 months ago)

To prevent air exchange around the lid. Especially moving them around .

Grafting tape from farm supply or an inch cut off the end of your saran wrap works good too.


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OfflineDaddy4487
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Re: Petri dish [Re: Rusty2096]
    #28007130 - 10/19/22 09:18 PM (2 years, 2 months ago)

Plus not to mention the obvious, it keeps your lids on in case they get knocked over or dropped


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Invisibleloladoreen
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Re: Petri dish [Re: loladoreen]
    #28007139 - 10/19/22 09:21 PM (2 years, 2 months ago)

So I just put a piece of tape on it. Put it in a cupboard and forget it for awhile.
I get condensation.
And no success yet.
What should I be doing?


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Offlineschpat
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Re: Petri dish [Re: loladoreen]
    #28007296 - 10/20/22 12:45 AM (2 years, 2 months ago)

Depends, what are you doing?  Germinating from spores?  This can take a while, I had a plate recently that took 60 days to germ, but normal is about 2 weeks.


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Invisibleloladoreen
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Re: Petri dish [Re: schpat]
    #28007624 - 10/20/22 09:42 AM (2 years, 2 months ago)

Spores


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Offlineschpat
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Re: Petri dish [Re: loladoreen] * 1
    #28008612 - 10/21/22 12:39 AM (2 years, 2 months ago)

Condensation is normal, there are ways to minimise it.  Just keep waiting on those plates.  How long has it been?


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OfflineLogicaL ChaosM
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Re: Petri dish [Re: loladoreen] * 1
    #28008622 - 10/21/22 12:48 AM (2 years, 2 months ago)

I use small 4"x4" baggies for mine, but its the same concept: to keep the agar clear and to keep the moisture inside the dish.

Spore germination can take up to a week depending on the condition of the agar, ambient temps and the age of the spores.


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Offlinecozmyc
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Re: Petri dish [Re: LogicaL Chaos] * 1
    #28008629 - 10/21/22 12:53 AM (2 years, 2 months ago)

I dig the bag trick, I may try it out!


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OfflineLogicaL ChaosM
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Re: Petri dish [Re: cozmyc] * 1
    #28008638 - 10/21/22 01:06 AM (2 years, 2 months ago)

Bag trick, i dig that name :cool2:

Yeah, they're great. Convenient too.

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