WPM or dried water spots?

[BatmanPetersenc]

Hello all! Quick question: does this look like WPM or possibly dried water spots?

• 4x Chemdog clones, about 25 days into flower
• 2x4 bed in 2x4 tent
• Coots mix from BAS
• water ~3 gallons every 3ish days.
• 6" exhaust with air intake at soil level.
• One rotating fan above canopy
• one stationary fan above light pushing warm air towards exhaust
• HLG320 Rspec FR at ~60% (around 550-800ppfd depending on where I measure w uncalibrated photone app)
• was watering with a sprayer head, switched to a more controlled nozzle

If wpm, dowa a daily 10:1 milk spray sounds about right?

Thanks in advance!

 

[LoveGrowingIt]

It could be WPM. I've never had it on any of my plants. I've seen recommendations to use a 33% milk solution or 1 tablespoon of potassium bicarbonate per gallon of water. A 4 to 1 solution of water to hydrogen peroxide could help, too.

 

[HerbalEdu]

6 part water 4 part milk work like a charm against wpm

not sure that's your issue thos may be the second photo look like it