Ill switch the photo period.. i thought you just wanted it on at night for heat issues though? Tanks stays between 78 and 80 even with all teh lights on at once.
Its def getting enough flow. As for nuitients, im not sure. Nitrates are undetectable..
If it's turning white on you,dump it cause it's starving as for the night time,Most of us have our lights off at night so you then have the fuge light on during those ours.