Is this root rot or beneficail fungi growth?
 

http://s22.postimg.org/678qle1vl/IMG_2302.jpg
http://s22.postimg.org/rfmvm6xa9/IMG_2304.jpg
*sorry for bad/blurry image's its the best I could do atm.

My rooted rooted off a while ago and recently starting growing back nice and white so I added some beneficial fungi (mycogrow MycoGrow? For Vegetables--1 oz - Fungi.com ) about 1/16 of tsp in the hopes it would prevent future root rot 4 days latter they turned from very slight brown to that image.

Is that the beneficial fungi growth or root rot? Hit it with h2o2 and kill everything?

/edit did a water change roots don't look as bad as I though 99% sure it's the fungi.