John,
Really don't use any fungicide/bleach pretreatments. I just make sure the seeds are fresh, properly cleaned, and into a sterile germination media.
The only time I run into mold/fungus problems is with older seeds, a couple bad ones in the batch will quickly spread fungus to the good ones. So I usually just toss the ones with repeated problems, unless they are expensive seeds, then I start trying every treatment possible 😆

Thanks for the link! I've used Chamomile tea in the past, it works well as a mild fungicide.

http://www.weekendgardener.net/plant-propagation/chamomile-tea-030803.htm

Steve