So it all started about a week ago, I got these little red rust spots on my leaves. It's held steady so far with some very mild yellowing leaves but I decided to change res so that I could refresh its nutrients. All of a sudden an hour later its excacerbated greatly and now is worstening by the minute along with drooping leaf ends. Notice the yellow splotches on the leaves and the spreading rust spots. NO IDEA what this is. Currently feeding in 2g res. 8ml of gh bloom, 5ml of micro, florilicious .5ml, calmag 5ml, no nirtrogen supplement at this time. Please advise ASAP!
PH: 5.9 steady
Res temp: 68
Light: 212 watt 4 inches away cfls.
light cycle: 12/12
Age: 4 weeks