SC organic has the best insight so far.

If you go to a nursery that sells tomatoes in peat pots, you can pick up the pot and see how there is mold growing on it, but the plant is healthy.

If you fear mold of any sort... dirt is not for you... go play in the water...

I personally ADD mold to my soil... mycorrhizal fungi...

Oh and I HATE HATE HATE peat pots, pellets, peat-based soil, etc. Peat is a serious pain in the ass to deal with. pH, water retention issues, yuck.

And gatekeeper, I don't want to be a gadfly towards you personally, but I've seen some of your advice (adding what was it, kool-aid mix or something, to your water to make the buds taste like kool -aid) seriously unless you are SURE you should be VERY careful what you post.

Bleach is a solution of 6% sodium hypochlorite... Peroxide is simply a fairly unstable molecule that quickly breaks up into nothing but water and oxygen gas (2 H2O2 -> 2H2O + O2) and leaves no residue.

Guess which one I personally would rather use on my plants?

While bleach has a place in your grow room, like sterilizing pots and cloners and the floor, and even a quick rinse (no more than 10% v/v) for suspect seeds, I keep it away from my plants.