i dont know anythin about your nutes but there will be plenty of ppl in here that will be able to help you.... as your temp and humidity they seem fine. im growing a white rhino in bubbler and i use advanced nutrients products. only info i can give you is treally the basics on what to do..
how far above your plants is your light,.? you want it about 16-18 inches above your plant at all times so if it grows an inch you move your light up an inch. if you have an oscilating fan get that in there n cool dwn the tops of the plants while moving the air around your grow room..
i change my nft tanks n bubbler once a week and put fresh nutes in and increase the amount i add every week till (in veg) its big enuf to flower. in flower i do the same but peak my nutes in the 4th week and drop back down slightly over the next 2 wks and for the last two weeks i only give water to flush out all the chemicals.