my first thought is to wonder.. since youve only had it a month.. what happened to it before you got them??? .. we will never have that answer ... unless you have a seller that you can ask ... meaning other than bigbox ...

then i wonder how cold it was in december.. when you carried it out of the store to your car etc ... was there a cold event.. minor.. in that we are just seeing the result now ...

if it were me.l. i would water properly ... letting it near dry before watering again .. and see what the new growth looks like ... and if it comes out fine.. there is nothing currently to do ...

its severely stressed.. its not hungry... fert is not a response ...

and repotting will just stress it more ... so that is for spring if you wish ..

water properly.. and ignore it for another month and lets see what happens... report back plz ...

and.. btw.. even a damaged leaf can convert light into energy .. so no matter how ugly they get.. as long as there is some green leave them there.. and when they are all yellow.. lop them off ...

ken

ps: with that ceiling.. im wonder if this is a sun room.. and how cold it gets in there at night in winter??? ... it might not be too cold for your other plants ... but we dont know if this one came from a cozy greenhouse and the temps are a bit out of its comfort zone.. when you brought it home ...

these plants like humidity! make sure you are providing them with adequate amounts.

the leaves kind of look like they are suffering from dry air.