Well, while there'r far more knowledgable people than me, from what I've read, root rot will smell rotten, and feel slimey and you can easily tug out rotted roots. But you say yours feel normal and dont smell like rot, so I'd have to guess you're ok.

While you pull them up like that, you could always squirt some H2O2 directly on the darker rootmass and call it a day I think.
MisterE Reviewed by MisterE on . Are my roots ok? no root rot I hope. I had a little problem with algae about 3 weeks ago and light proofing and a little h2o2 took care of it. Now my roots look brown and dark brown in some places. Are my roots ok? I hope its not root rot. Roots still grow but I dont like the look of these roots. MyAny opinions? Rating: 5