Yeah, that looks a little worse than in the blurry 1st pic.
The hydrogaurd and increased o2 should take care of it.
Be sure & use an oversized pump and good quality fine bubble stones.
*You cannot give them too much o2, especially in warmer temperatures
No h2o2 yet as it will also kill the beneficials in the hg as well.
*from chat:
- Roots love oxygen — it fuels aerobic respiration, which gives them energy to absorb nutrients and grow.
- In deep water culture (DWC), more dissolved oxygen (DO) = faster growth, stronger roots, and less chance of root rot.
- Even at high levels (10–12 ppm DO), no harm is done — it just keeps things fresher.