What would that mean for my grow? If its fungie, is this a death sentence?
Probably not. There is lots of advice out there to deal with this, and different approaches, I will not say one is wrong or right or any better than the other. Instead I will speak only from my own experience...
I highly recommend a product you can get easily online or in many hydro or gardening stores called SM-90. I was using H2O2 before, it worked but I didn't like that it was basically creating a sterile root zone. I like to keep the root zone party alive...
A little history...
SM-90 was designed in the 1990s to kill spider mites on commercial roses as a safe alternative to chemical pesticides. We MJ growers have found that is only the beginning of its usefulness... it can be used as a topical spray, but also works in soil/hydro and there is evidence that when used this way it works systemically against insects without being unsafe in any way. One of the ingredients is 1% coriander oil, which I believe is the main insect-fighting ingredient* which also gives the solution a sweet and spicy fragrance.
* http://www.bioone.org/doi/abs/10.1603/029.102.0422
SM-90 lets good bacteria and mycorrhizal fungus live; it kills anaerobic bad bacteria and mold and mildew; it lowers the surface tension of water; it kills and deters MANY types of insect pest.
https://www.icmag.com/ic/showpost.php?&p=1941844&postcount=9
That's hearsay but I've read numerous posts with identical feedback from the company. So you can try and call them yourselves if you don't believe me and the internet

Incidentally, it makes your solution smell very nice. I'm addicted to the smell now.
*huffs some SM-90*
I swear I don't work for them

Im not using anything against bacteria at the moment, in the future i want to introduce some beneficial microorganisms in my system. Thanks for the compliment, i appreciate it!
That's perfect that you said that right as I was posting to recommend this product, it's one of the few choices you can run alongside beneficials. Instead of the beneficials fighting the bad stuff though, the SM-90 kills all the bad stuff and the beneficials can 100% focus on breaking down nutes to support the mycorrhizae which in turn supports the roots for one hella-happy ecosystem.
Of course if you are running 100% chemical nutes there is no real reason to have beneficial bacteria... I use Big Bloom alongside the
I should mention finally SM-90 keeps your stuff CLEAN! SO CLEAN! Minimizes or eliminates white slime, NO foaming, NO crusting, hell I can rinse 2-week-old buckets clean with the showerhead.
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