can anyone id these spots?

[BRICH999]

One of my 4 plants are starting to show a few rust colored spots on the fan leaves coming from the main stem. Overall i think the plant looks healthy, sorry the pics arent under better light but they are a pita to take out of the closet.

Using cal+mag, and dutch master nutes (A+B, add.27, and silica) and sunshine #4 in 3g smartpots. Mars II 700 and t5, northern light fem autos about day 58. Plant with spots is shortest and most developed and i was considering starting flush soon to make room on this one.

So whats causing spots and should i be concerned?



Bonus awesome pic i took this morning. Gold star to anyone who can id either or both!

 

[Spanglish]

Have you got any way of checking your PH, i am far from a expert but if it looks anything like the pic below, is a good early sign of a PH problem. If this is the case and you are going to flush soon anyway i am sure it will be fine as a flush with PH water before harvest is going to solve it anyways.



Would be worth checking your PH and adding it to the post also as would help any of the other more experienced members help with diagnosing your problem, am sure Muddy will be here at some point with some pro advice.

 

[Waira]

Hey Brich'- looks like early Ca defc. to me,.. very common with LED lights, and common to occur at this stage as well, even with Ca-Mg supp's being used,... pH is a concern, but with Ca, it's pretty robust for availability across a pretty broad range,... can you get us a reading? Meantime, up your Ca-Mg conc.,...
... that other pic looks like frost rhime...?

 

[krug]

Plus it looks like you`ve got a couple of leaves that are displaying ph prob shapes (but I guess that `could` be genetic though...) Rust spots always upset me as well btw ...Don`t panic, don`t panic (Mr Mannering...). You`ve got a couple of clever flucks looking after ya bro!(I disclude m`self from that last statement btw!) :tiphat:

 

[BRICH999]

Thanks for the help guys. For ph i have gh up and down and their drop test kit. I know it isnt extremely accurate, but ive been trying to keep it around 6 +/- .5. I read different nutrients are absorbed at different ph and all seem to do best between 5.8-6.2 so ive done my best to try to keep it around there. IIRC calimagic said to use 2ml per gallon and lately ive been using 3ml.

Thanks guys, I know i wouldnt have gotten this far without all your help!