my temp never goes above 77 or below 74. i am right on the money ppm ph is 5.8 nutes temp is 73 ,i am trying to give you guys as much info as i can cause i really love my babies i spend a lot of time with them .... i have used cannabis to relive my back spasms for years and now finally Mich is a med state and it feels so good to be able to talk openly about this wonderful plant that has maid life better for so many of us.....