Sub'd
Stopping in to take a peak! What are your res temps? I bet your roots are brown because those buckets are getting above 68, it's hard to control temps in those buckets, that is how my old DWC set up was. I'm not doing DWC at the moment, but I'm probably going to go for a way oversized undercurrent system. I am finally in a house with a basement so I can bury my main reservoir, so I can keep temperatures without a 300 dollar chiller or frozen water jugs.
How low are your water levels? The lower your water levels you have the more rope like roots you have. These roots don't take in food, so the brown stains will just rest on them. These roots just transport food from the root hairs down below and bring them up to the stalk. The roots that sit in water will have a lot more hairs all over them and they usually stay pearly white even in liquid compost tea, because they eat it up. So if you see brown gunk on your ropey roots but your plants are happy and healthy, it is just because you water level is too low. Bring it up on your next crop and your plants will eat faster.
Your Venom OG looks like a fucking MONSTER! And it still has 20 more days to blow my mind. Some of your flowering plants look a little over feed. I saw some blue-green foliage.
Good luck, and happy Fathers Day. I'm cooking my dad up some special Father's Day grub right now. And then I am going to trim him up a Father's Day SFV OG harvest, that'll make him happy. haha.
