Here are the plants DH has in his office. The peace lily seems to be really happy but the philodendron is having trouble. DH gives it 3 cups of water once a week. I think that may be too much but I wanted y'all's thoughts on possible causes before I told him to cut back. It could probably use a repotting. It is in regular potting soil from before I was here and knew better.

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Notice the yellowing margins of the older leaves, also the new growth is TINY.

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