Ok, can't seem to shake this root rot, hopefully someone out there can point out something I am missing. Growing AK 47 in DWC, using General Hydroponics nutes. 1.Temperature- Low to mid 60's with a chiller probe if it hits 72. 2.Light Leaks- Bucket is sealed and wrapped. there is a tube on the side that is see through to allow me to see water level. Top of plant is covered so no light leaking in through. 3. Hydroguard- Adding it at the recommended levels, but started adding more as a test. 4. SLF 100, added at the recommended level. 5. Water swapped out every week. 6. Active Aqua 240 GPH with 4 air stones. Lots of bubbles. The plant appears to be doing fine, I just can't seem to get nice white roots. I started Hydroguard last week and the top of the water is foamy, which I have read is a good thing. I have already cleaned the entire container with bleach one time and Hydrogen peroxide the second. Am I over worried?