Masters Mix

Finally an affordable sterilization kit.

MushroomMediaOnline.com is proud to offer these Presto Mushroom Sterilization Kits.

In order to give back to the Mushroom Community, we offer a 23 quart Presto, 25 Unicorn grow bags and a 10lb bag of our amazing Fast Fruiting Mix all for the low bundle price.  Once you add the Presto to your cart a pop up will offer you the masters mix and available Unicorn Bags to choose from.  The discount is automatically applied as the line item titled “Presto Kit – Bundle and Save!” in your cart.

So you not only get a great deal you also get your hands on the best mushroom grow bags and substrate on the market. We have these ready to ship now.

Unicorn Bag Type 3B - 25 Count

$23.22
8″ X 5″ X 19″- 2.2 Mil - 1.5” x 1.5” 5 micron B Filter - Typical Block Size: 5-7 lbs
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Unicorn Bag Type 3B - 25 Count
Product Details
Brand: 0.00

Type: Gusseted

Material: 2.2 Mil Polypropylene

Bag Size: 8″ X 5″ X 19″

Filter Type: B

Filter Size: 1.5″ X 1.5″

Filter Pore Size: 5 microns

Filter Hole: Style L

Best used for Oyster Mushrooms. Has higher air transfer.

This bag is identical to bags 14-A and 3-T except that it has a type B Filter. It is often used with substrate for mushroom production and holds about 5 pounds of substrate.

This side-gusseted breathable bag gives a sturdy stand-up bag after filling and a strong bottom seal. Unicorn Bags are pliable at any temperature as well as after sterilization. The bag opening is designed for easy sealing and the bag’s bottom seal can withstand agitation.


You can even save more time with MushroomMediaOnline’s own Fast Fruiting Mix that is that ideal mix of 50/50 hardwood sawdust substrate supplemented with 50% soy hulls.
Free shipping with your bag purchase from MushroomMediaOnline.com

We offer the lowest cost per bag by finding the very best shipping rates for your bag delivery. The larger your order size, the more you can save. Choose your purchase size and see the full price with free shipping included.