Trust me, i'm not being combative here. In earnest, I am trying to help. Unless you check your pH, how can you know that your water is pH'd? The brita filter removes solids/salts/etc, but it does nothing to buffer pH, in fact, removing salts from water decreases it's pH stability. Unless you check the pH level & then balance it with solution or the like, it is not pH buffered. Brita may suggest that solution coming from their filter ranges x-y & 1-2 (based upon heavy assumption of source water & filter age/performance), but this does nothing to attest to your solution pH, especially once you mix nutes. There is absolutely no way for you to proximate the soil/medium pH as well. Regarding the tds, this is also true. Unless you have meters (very, very basic & essential of tools), you are just guessing. 85-90F is a problem, 95% of the time. It takes a very experienced grower with lots of dedicated resources to properly manage a room in that range. Not a knock on you, just a fact. The LKarma will take care of the stress relieving hormones (vitB). Still would suggest a very light nute mix as they will require food as they recover. Again, mean the best here. Good luck.