Big yellow spots on leaves

[Pupka]

Originally Posted by gerneveyn

I don't think your phal will die. It looks like it's getting a new healthy leaf. If a plant has fungus, it will appear as brown or black mushy spots on leaves or roots. Out of curiosity is there anything on the underside of those yellowing leaves?

Same yellowish thing but not as bright as on the outer side and much less in diameter.