it gonna get crowded in that pot quickly, i see you have 4 plants in there, leaving the fan on all day is cool dude, dont be shy, for sound reasons i love those little clip on fans, but hey they look good, as for the crowded plants, its gonna be a jungle soon and i think you wopuld be best served if you had a fan on them, clean up the lower branches when they get bigger and consider flowering sooner than later