Fan leaves look crusty and have brown spots on them

Heyy just started my first grow and im into the 8th day of flowering and some of the the plants fan leaves mostly on the bottom part of the plant are really crusty and have some brownish yellow spots on them there are also these little white specs on them

I feed my plants with plain tap water no nutes
i have 5 cfls on the plant 4 of them are 23 watts and the last one is 43 watts
the temp is basically regular room temp, not too hot or too cold
I did have a minor problem with fungus gnats when the plant was in vegetative stage but i dont see any fungus gnats anymore


this is the the one out of the four fan leaves that are showing, the symptoms and is also one of the worse out of the four
 

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