Very high before using ph down.. 5.8 with ph downWhats your ph? looks more like a deficiency.
I'm feeding Dyna gro foliage pro silica and cal mag.. they haven't been drying out very quickly but every 3-4 days, new growth is yellow I'll get more photos in a littleDamn! Looks like a few things going on. Mag, cal, micros......What are you feeding and how often? and yes pH
Better photo with a natural light? are they white or yellow on new growth?
Looks like iron lockout if yellow from high pH
If you have a pocked microscope or high power jewelers loupe pull the plants out of the pots about halfway by gently rolling and loosening the dirt and pulling on the stalk of that plant and the pot to seperate them. Look at the color of the roots, scope the roots with your microscope for root aphids. The flea jumping things could be root aphid nymphs and the flying things might be root aphid flyers.But noticed there is little bugs jumping like fleas and also gnats starting to fly around
I'm feeding Dyna gro foliage pro silica and cal mag.. they haven't been drying out very quickly but every 3-4 days, new growth is yellow I'll get more photos in a little