I have a 230 ltr tank with 160 wts of T5 lighting and pressure co2 3 bubbles per min I usually have to trim at least once a week .Ive been noticing of late that my plants seem to grow faster at night : ie lights off the rotala green and macrandra can grow at least 5-7 cm over night I wonder is there a reason for this .Silly question I know but I cant find any imformation on growth rates difference between night and day