I tried collodial silver once, it didn't do anything. I Hope you have better luck. I've read that aspirin works to create feminized pollen, but i haven't tried this.
I just had a mushroom growing in a little 6 inch pot and its easily the healtiest plant in the growroom. I used my mushroom guide and keyed it out to an Orange-mat Coprinus, Coprinus Radiens. The guide says that they grow on wet wood. I think mushrooms are good beacuse most soil mushrooms are...