Still fighting the heat, added a stronger bottom vent, managed to stabilize the temp to 25C.
Relative Humidity is still a bit high, specially when opening the tent in the morning and at nighttime.
AC working strong.
Started taking PH measurements, though not very accurately (chem test).
Apparently my mix of 2:1 Brita/tap water was good, the water in the tap is very alkaline (>8), the filter reduces the PH nicely.
I read that Brita also filters out CalMag, so I've added a little boost.
I'll stop using the greengro nutrient next week, I think it's Nitrogen level is too high.
I received Johnny Green's Greengro in a grow deal, the other nutrients (except CalMag) are from the same line.