my air pump failed on my oxypot and roots are brown now, but not slimy. How can I treat this or shouldthe roots start growing normally again?

Try some regeneroot it might help 916

Do as 916 said.I used to use Canadian express nutrients but ditched them after a few crops but iv always kept a bottle of regen a root I had the ph dropping a lot and the roots were not looking too clever so banged regena root in and did the trick done it a few times and always soughts it.hope u get it soughted mate.