D58 Jun 11th- No water
D59 Jun 12th- Watered
D60 Jun 13th- Fed 10 ml bloom and 3 ml cal mag
D61 Jun 14th- No water
D62 Jun 15th- Watered to run off
D63 Jun 16th- No water
D64 Jun 17th- No water
Hey there IMHO it could be a lock out , those rust spots are a sure sign of cal or mag def. Also check for violet or purple coloring on the leave stems. Also I would lower the ph to around 6.3 to 6.7. I find keeping the ph between these numbers help the plant to take up nutrients. And a good dose of cal-mag would help , and the good thing about cal mag is it's really hard to over do it.
!!! CHEERS!!!
@MrJones, soo sorry for the late reply.. missed your comment. I use distilled water with a bit of great white from time to time. Sometimes I'll add just a hint of guano but not often and if so I might use a saturating agent to help with uptake.