Liberty Haze - DWC - 7+yr old seed

**Wednesday 3/3/2021 - Tuesday 3/9/2021** I started noticing some dark area's on my roots in a few spots so I went into a research deep dive looking for solutions. One of the big ones was the water temperature. I've had two pretty successful DWC grows back 7+ years ago and I never came across the importance of solution temperature back then. I spent a rediculous amount of time looking into the most affordable method of cooling my solution temperature, and the best I could come up with on short notice is the ice bottle method. I have put my bucket in a water bath in a container. I can drop the ice bottles in the water bath so I am not having to place them directly inside my solution bucket. The water bath itself has brought my temperatures down within acceptable ranges (68* or below). I also bought a cheap digital aquarium probe to more easily monitor the solution temp. (using the ph pen to monitor temp. was way to much of a hassle). So far I've had to use very little ice. Also, I originally used clear aquarium air hoses to my air stones. I was afraid this was causing too much of a light leak so I had some spare black hoses (I used to use them for an old C02 tank setup) that I'm now using for my air stones. Lastly, there is a slim chance that the brownish color I'm seeing on the roots in certain area's is where they are rubbing up on the air hoses. Because I'm using both Roots Excelurator and Liquid Karma, I got a brown film buildup on the air hoses. Maybe that is rubbing off on the roots and causing the discoloration. I think this is the least likely scenario but I do believe could be possible. Better safe than sorry though. These pictures were taken this morning during my weekly water change. I did not up the nuts this week because I'm not really seeing the plant taking in any nuts yet. My ppm has steadily climbed over the last week (not too bad though). I'm leaving the nuts at the same level I did last week. So far, the leaf discoloration is only on the first three sets of leaves: onesies, 3-leaf, and first 5-leaf. All the new growth past the first 2 sets of true leaves is looking healthy. Also, this plant is way stocky/bushy compared to what I'm used to. I think this may be due to the light I'm using. I'm used to using a 8-light T5 ballast. I think I'm getting more lumens and my plant isn't stretching as much as what I've experienced in the past.