i dont know shit about aero but your spray times are waaayyyyy to far apart. normally with out the fog it should be 1 min on 4 min off.it looks like under watering to me.do a test,pull the net puts and put them in a tub with oxygen rich water and nutes.your ppm if not doing fog should be around 300-350 by now.any ways let them sit in the tub with oxygen stones.if they perk up in a hour or 2 then u got your answer my friend.