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Alright here's a pic of what it started out looking like.
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Here's about an intermediate stage of it. At this point I started thinking maybe Mg deficiency so I treated everything with a dose of Cal-Mag 10mL/gal, but then after that I got to thinking it was only on 1 plant before I did the transplant. 2 days later it was on everything after I had been in there messing with everything doing the transplants. The next reason I started steering away from a deficiency is I'm growing in soil. How likely is it that all of them would go through this severe of a deficiency at the exact same time?
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And this is the stage right before the leave completely dies and falls off. This picture is what finally brought me around to believing it is Rust Fungi after hours of google searching it.


So after being on the Plant Problem forum for a couple days now, the 2 main conclusions are:

1: Mg and other micronutrient deficiencies since I was using R/O water(I just switched to tap.)
2: Rust Fungi


The Mg and other micronutrient deficiencies should be solved by me switching to tap water, however I'm going to continue to use the Cal-Mag for the next 2 weeks(figured I've already bought it might as well use some.)

The solution to the Rust Fungi is a bit more complicated. To the best of my researching abilities, I've found that using a Sulfur vaporizer is about the best way to treat it. From what I can tell it raises the pH level of the leaves to an unsuitable level for the fungi to grow on it. I also haven't found any adverse side effects as long as used properly and not within 2 weeks of harvest. So I've order some sulfur online(the pure sulfur meant for vaporizing is a real pain in the rear end to find, took me like 2 hours to find a place that sells it.) And I plan on building the vaporizer tomorrow. I found a really easy and cheap DIY on another cannabis forum site.



So that's my plan. I've already cut down on the watering so that shouldn't be a problem anymore. I just really noticed it in my plants this week when things went wrong, but the funny thing is by updating this log today I've been able to track back to when it really started. Wish I would've been keeping this log a little more up to date, some of you experienced guys probably would have caught that along time ago. And that might have prevented my problems now. I'm gonna try to keep this log more up to date from here on out. Like always if someone has suggestions, advice, and or comments feel free to send them this way. I'm always looking for help.


P.S. Anyone know why I have disabled rep? Did I offend someone? Give bad advice to peeps(I try to keep quite and listen unless I've got a good idea what's going on?) Just Curious, no big deal everything still works and I've still got access to the site.