Hydrogen Peroxide

If you've tried the perlite method and had problems with contamination, or if you'd just like to be extra careful, you might want to try mixing a small amount (.5% solution) of Hydrogen Peroxide into the water. In theory, this low level is enough to help reduce contamination in the perlite layer, but isn't enough to hurt the mycelium since the cakes aren't in direct contact with the liquid. Some people suggest pouring the hydrogen peroxide directly onto the perlite layer before adding the cakes, but I might recommend mixing it directly with the water before adding the water to the perlite so there's no change of the cakes coming directly into contact with any significant amount of the hydrogen peroxide. Either method should work fine.

Since the spores you get from a sporeprint come from inside the cap of the mushroom I don't think you have to worry about them getting killed. When it breaks down I think the only thing that gets released into the air is that extra oxygen molecule.

-snarf

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all in a dayze work