Tiny yellow specks on top leaves... no signs of bugs I think

BigAllack

Member
Hey guys first grow going on here and I’m just about week 6 into flower in my diy hydro/closet set up. Currently the temps never go above 76 and humidity stays below 50%. Ppms are at 800 and the water is ph’d to 5.9. Other than the general hydro trio of nutes I am also adding in their kool bloom booster and calmag. About three days ago before I did the res change her ppms were 1400 and I noticed some leaf tips browning too so I changed the water and put her down to 800. I have a very trappy light set up with a 150w ufo led as the main light about 18” above the canopy.

Now back to the spots. They’ve been there for about a month I think and don’t really seem to be spreading too much but are becoming more prominent over time on the leaves they are on. I’ve checked for spider mites and they don’t look like broadmites either. Anyone have any clues?? Any advice is much appreciated!
 

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