Brown spots appearing on plant. Please help!

AdmiralR

Member
I've included some pictures of all the spots I can currently see.
They first are just white spots, and then they just look like spots of dead leaf.
I'm not sure what is happening.
They get a massive amount of ventilation, too much really.
If the blower next to them went a couple degrees angled more towards it, it would probably just be ripped out of the ground and sent flying.
Could it be the water? I don't have a PH checker, but I give it reverse-osmosis.
Please help. Thanks
 
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