all evergreen plants.. lose the older leaves on an annual basis ... some years worse than others ... and that usually happens in winter ... when light levels ebb ... i think.. one of your problems.. is that it has outgrown the window ... when it was much smaller... it got much more light on top of its leaves ... i dont have time to find you the latin name.. but i do know.. when you get it.. and google such.. there are millions of websites on how to propagate it [youtube also] ... as you are well aware.. its not that hard.. if the whole family has the plant ... and once you cut the trunk to say.. about 6 inches.. and propagate 20 or so plants from the trunk .. the part still in the pot ... will rebud lower down ... do not swamp it... over-watering it .... in winter ... it will be much worse.. if you rot off its roots... been there.. done that.. lol and no.. a stressed plant does not need to be fed ... perhaps in late spring would be better time for a bit of plant food ... ken ps: when you cut it back to 6 inches.. that would be a great time to get rid of all the old 'used up' media... and repot it ... potting media does not last forever ...

If a pothos, was too cold. but another image showing the entire plant might provide more clues.

I need the cavalry's help! I'm unclear about what it might be. Foliage pics are overexposed to see much. That leaf is too random of a sample to be confident about much, it could be so many things. The stem, now that's a scary one. But the action is described below ground. In your summary: Wilt, that watering doesn't cure, and pale leaves, so we know there is some sort of transport damage starting in the roots. Some sort of "root rot" or pest, or as you cover physical damage in the small container. We need a closeup of the stem section from the mix level up, since the one you have a little higher is is oddly speckled instead of especially streaked, but might be V; LB has white spores, but the residue looks more like a fungicide or possibly mildew in addition to something else (though you think not mildew). Anyway the stem emphasizes a root rot cause. Also, any adventitious or surfacing roots around that area where stem meets mix could hold clues and if they are photogenic, or can be sectioned for inspection, though that could hurry the demise of the plant. I noticed the pink plastic around the roots and in a humid environment that is promoting fungal growth, or is it to quarantine the infected plant? Were there saucers or did water puddle in the bottom of this mix? Foliage problem traveling from old leaves on bottom upwards? Symmetrically attacked or just one side, the usual questions? Sometimes the plant doesn't show symptoms until warmer weather sets in and everything grows faster+ plants demand more to support faster growth. Before you can say whether a plant really needs to be pulled you need that diagnosis (as you already know) If we dawdle too long the plant may be severely wilted before you know it. Removing leaves isn't always helpful if it is root rot since they are downstream of the "root-cause". PC

There are more than a few reasons for this.You could be using tap water which plants don't like as it's more than toxic. Bottled water is just as bad as nine out of ten of branded bottled water contains bacteria and parasites which are bad for the soil and of course any living organism humans included.This is why if you leave bottled water in a hot car for a while it can go stale. Also mineral water is a total scam as inorganic minerals cannot efficiently be assimilated or even absorbed by the body as they are hundreds of times larger than organic minerals we are meant to consume from plants and algae etc. Nevertheless plants have no problem using inorganic minerals and converting them into organic minerals which is a huge benefit for us herbivore's. If you have any spare cash lying around the buy a water distiller for the plant AND yourself. The micro organisms in the soil will benefit drastically as will the plant from this. Also there is rumoured that distilled water is bad for your health because it robs you of minerals,another lie which is incorrect as it only takes out positive charge toxins and metals which are bad for you, in the cells and body systems and keeps good minerals etc in the body and cells.this is because it bears a negative charge which literally pulls crap out of every area of your body like a magnet. Distilled water is the best thing you can do for yourself and your plants in this day and age.....It's time consuming but it's definitely worth it. I really could go on and on so any questions you have make sure to ask me for answers.