White Widow Auto

Completely over thinking the grow now as I'm not used to a grow tent. I need an exhust fan which will come soon but even though I have ideal conditions 26c and 68 - 70% RH I still find myself opening vents , moving fans and also checking on my plants. After reasearch I've also seen i can leave everything running with no dark period so now I'm torn between 20/4 and 24hrs schedule. I guess patients is key but everything looks healthy. In my medium I've mixed in some FIsh, Bone & Blood meal and worm castings on the "unknown plant" watering I'm finding my soild really dry on top and very lose but watering every two days and spraying surface everyday. I welcome any hints or tips.