please tell me what this is

ive never seen this before. what is it and how do i fix it? oh and ive got a small mold problem on the plant leaves any tricks to geting rid of? thanks

that sir, looks like an iron deficiency (which may indicate a ph imbalance)...go to a hydro shop and ask for an iron chelated foliar fertilizer...as far as your mold, what kind? try and carefully prune the affected areas and treat with a fungicide...which you run a risk of spreadin spores just by messin with as far as removal, be very careful and sterilize your tools between each cut!