Thanks for coming in
@Bill284.
Let me first personally congratulate you on your win. Well deserved from the time you take with others in many areas, a credit to your wonderful conduct, not just as a member but as a person in general.
Yes, only on the lowers starting from the bottom advancing upwards. Has started with an opaque discolouration in patches on the fan leaves that brown off. Also some noticable yellowing that seems to work from the tips back toward the connection with the stem. If left long enough, complete yellowing and discarding.
Media is a combination of seed raising potting mix, coir worm castings, and garden soil (well composted and mature manures with ammendments) with perlite added.
Feeding is with common garden bottled products, Nitrosol (blended NPK solution with some macros) GoGo juice, and a PK product. I can get pics of contents if required although GoGo has no ratio info. These are applied at recommended garden strength or slightly higher. In addition I use a few epsom salts, molasses, and nettle tea.
My guess is the coir upset the balance, or saturating them with an excess that has caused a lock on another, or using the PK shifted the PH too far.
They do not appear to be suffering greatly by any means but if it can be diagnosed Ill be happy to take steps to address it.