What are those spots?

Player3

Member
Hi there,

since 3 days I noticed some whiteish spots and leaf tips on a clone I’m trying to reveg. It’s dr greenthumb OG Kush Ghost cut taken in flower week 5. it’s fully rooted and roots keep expanding, but didn’t show any new growth yet (35 days in).

DWC, RO Water with Flora Series for Soft Water 1:1:1 ratio EC of 0,6 pH from 5,5 to 6,2.

Reservoir temp is 20c and they get 100W of COB LED from about 45 cm above.

anyone got an idea?
 

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