Darktideanswered grow question 4 years ago >Remove any brown, slimy roots, which can be done by running thru water and a clean pair of scissors.
If there is no white roots left then sadly it will most likely not improve.
>Once the rotten roots are removed you can try a soak of 30ml of 3% peroxide to a gallon of water for one hour.
>The peroxide provides extra oxygen to the roots.
I would also suggest that you flush your hydroponic system, clean it really well, and ensure your air stones, pump are working and not contributing to the root rot.
Great Luck & Happy Growing 🌱