Hey man, or it was a girl maybe.
Ya, temps have a lot to do with things. I always kept track of the res temp when I do hydro. I was having problems myself when my temps were to high. It was getting up near 80 sometimes last summer. At the same time I had more plants than my hydro could do so I put some in dirt. Even using beneficial bacteria the dirt plants did quite a bit better. It would take 3 to 4 days for a new mix to stabilize the ph. My combo meter has temp on it also but I used a digital meat thermomitor and stuck the probe through the top of the res so I would not have to get the meter out and just have to turn on the meat one to check it. About $10 at Walmart. I'll check out that link,