all the plants seem happy and healthy, the affected leaves are the lowest ones on each plant, I've come to the conclusion that they are discolored from coming in contact with the soil and/or nutrients when I top dressed. thanks for the help.
your watering every two days by finger testing in a 5gallon pot...but the only thing you can come up with is that they touched soil? you are going to to discredit my knowledge with a wild stab in the dark excuse of a diagnosis of it touched soil...
so now I want you to ask yourself....and be honest with yourself, look at your plant...you really think that's from soil contact? have u seen what happens to a leaf that spends its time in soggy nutrient rich water?
also, without much looking over,
this picture clearlyy shows you have an issue, you have bleaching on a number of leaves here and none of them are anywhere near your medium. in fact they are more than half way up your entire tree....infact there's signs of blotch spots on fan leaves not even 3 nodes down.
now I may be wrong, that's okay, but im not sitting here lying to myself about bleach marks only being on the very bottom (soil level) of the healthy tree...and necrotic and bleached because of soil with nutes.