@Psilocubensis, yep, it was down to a single 16l pot that was damper than it should have been, luckily I caught it early . The powder on the other plants was preventative in case anything was left in the tent
@Mancdad, that's a signal of excessive watering.
You should let the plant hang dry before watering, that way the roots grow at maximum, and you will never get fungus gnats.
@Unkle_JR, Thank, she's in a 12 litre (2.6 gallon) fabric pot. I grew three of this strain previously in the same pots and git about an oz each with my now veg light, I'm hoping having a better flower light will improve the yield greatly.