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Shop: North Spore Bulk Substrate   Mushroom-Hut Substrate Mix

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OfflineDoctorRobert
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Registered: 01/10/08
Posts: 79
Loc: Boulder, Colorado
Last seen: 16 years, 6 days
Re: 50/50 Casing. Advantage of adding a Verm top layer [Re: BlackPeace]
    #7887662 - 01/16/08 09:35 AM (16 years, 16 days ago)

Quote:

BlackPeace said:

What's about using Lime and Oyster Shell, does it really help against contaminants?

Thanks guys




Trich loves acidic materials, and peat is very acidic, by buffering the pH of the peat with oyster flour (5-10% by volume of peat), or hydrated lime, (about a level tablespoon for each quart of peat in the casing material), you are making the casing layer less hospitable to contams, and therefore prolonging the life of your cased substrate.

Always pasteurize casing materials, always, don't skip this step, and do it right. Get an accurate oven therm that you can put into the middle of a jar, and maintain 150-160 degrees for at least an hour, NEVER allowing the internal temp of your casing materials to exceed 169, or to fall below 140 for that entire hour, some do two hours.

Trich will start to die around 150 degrees, some say more, some say less, but around 170 degrees you will start to kill off the beneficial bacteria contained in the peat, which is very bad, since that is one of the best things about peat, it's beneficial bacteria, which support primordia growth.

Shoot for a casing layer pH of 8, but 7.5 is considered optimal. Starting at 8 gives you a little buffer, since the pH will drop with time. If you use hydrated lime be careful, don't use too much, and mix it into the peat dry before you hydrate the peat. HyLime goes to work fast, and can burn myc if used carelessly.

Oyster flour is less caustic, but it takes longer to work, so if you use oyster flour, let the hydrated mix sit for a few hours before you test the pH.

Some report good results using 5% HyLime, 10% Gypsum, and 5% Oyster flour, by volume of the amount of peat in the casing layer.

It's good practice to wear a breathing mask/filter while working with any of these materials, especially when they are dry. While they are not harmful to humans per say, you also do not want them in your lungs.

This applies to perlite, verm, peat, lime, oyster, gypsum etc..

Any dusty, fine particle materials need to be used with caution.


--------------------
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Edited by DoctorRobert (01/21/08 03:24 PM)


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OfflineBlackPeace
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Registered: 11/18/07
Posts: 1,069
Loc: Canada Flag
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Re: 50/50 Casing. Advantage of adding a Verm top layer [Re: DoctorRobert]
    #7896586 - 01/18/08 09:05 AM (16 years, 14 days ago)

Thanks everybody. I will go for a classic 50/50 without a top verm casing layer.

see ya


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Offlineatomicblue
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Registered: 11/09/07
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Loc: UP
Last seen: 14 years, 2 months
Re: 50/50 Casing. Advantage of adding a Verm top layer [Re: Mephisto616]
    #7900207 - 01/19/08 02:30 AM (16 years, 14 days ago)

Great advic!


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Shop: North Spore Bulk Substrate   Mushroom-Hut Substrate Mix


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