Can you give us more information? So the temperature is too high? What are you using for lighting? What are you currently using for cooling? A 6" inline fan may be better.
I have the new pb2000 you tested I'm using a cooling humidifier and fans to cool tent its in my BR with AC holding 68/70 degrees. In tent with 52/62% humidity.will cal-mag help with
@Guy Atchley 75-85 degrees is a better lights-on range when growing with LED grow lights. If it drops to 68-75 when the lights are off then that's fine. The humidity range you mention is also fine.