I always think those bottom leaves get stuff on em from the soil and that's what kills those bottom leaves. I always, always lose my bottom leaves like that, never cared as long as rest of plant is fine.
Waddup bam, tgif bud. They look normal to me still. Here's some of mine i know aren't defeciency yellowed.just regular look
When the finger viens off main yellow that's the bad one. I dont think he has a deficiency, just some bacterial necrosis maybe.