Looks like nute burn (Too many ppm's) or BUGS, or both. About the seeds wrap them in a damp TEA bag over night , then wrap them in a damp COFFEE filter, (better than a paper towel).
I had to do some extreme lsting cos they are getting to close to the light. The stretch was minging Ive also set up another fan pointing at the light. Anyhow.....
sup man im having the exact same problem as you did with your white widow , you responded to me by flushing. I was wondering if you had anymore advice and what you did to solve your problem? thanks man