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I think this started from
1. Me not running the system 24/7 letting the water sit still for too long
2. Using organic PH down
3. Non RO water
I have cleaned a lot of slime out of the res tank and brain controller I guess it has been building up a while (PH has been swinging up to 7.8 overnight for a while I didnt know why I read it happens...
Is this cyanobacteria?
from Hydroponics / Aeroponics
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