Now winter its 72-78 and summer i set it for 80 it work awsome with built in thermo where u can a adjust the temp... look into swamp coolers i used that before bought the ac and it will drop your temp 5c easy
Looks to me like a p def..red stem and blueish mark...had this happen to me ph pen was uncalibrated...the next time i fed her i checked ph with gh test and within 24hours was better... so yeah soil ph ..check it
A decent airflow is the key ...i would b maybe suggest a prtable ac that has a dehumid..those suckers woks like a charm it drop my rh by 30-37% when on and plus it has a self timer...