so i looked at my roots the other day and everything looks great but then i notice a lil browing at the tips of my roots. i know sometimes that's a sign of pythium and now i'm freaking out. i'm doing dwc in a 4x8 tray with close to 40 GDP. got 4 dual diaphragm air pumps so about 80l/min. using 2 1k mh bulbs. i'm feeding it supernatural gro aqua for my base nutes and for beneficals i'm using AN voodoo juice, pirahnna, and root excelurator from house and gardens (that's the brown stain on my roots, not root rot) my room temp is 84f, humidity 60-65%, co2 1200-1400ppm, and my water temp starts from 71f then by mid day it's 79f. i know that's freaking warm so i actually took down one of my lights today. i was only using one 1k mh and my room temp was staying around 74-75f and my water temp stayed steady at 71-72f. then my buddy told me the GDP loves the room temp around 84f. so to get it up to 84f i just added another light. well since i did that my water temp keeps climbing to about 78-79f. so are these yellow or browing on the tips somewhat normal? also in one of the pictures the leaves looked burnt what could that be. thanks and hopefully i gave enough info.