I have had this philodendron ever since I rooted it from a cutting from a friend's plant 4 years ago. After it had grown some roots, I moved it over to my fish tank where it THRIVED for 2 years. When my fish died, I didn't know what to do with the plant anymore, so I kept it in water. The plant survived for the next year in just water, but then, the leaves nearest the roots began to turn yellow and fall off. Any new leaves that grew had brown spots in them. I tried a few different sunlight locations, but that didn't help.
Recently, I trimmed off the old roots and tried re-rooting closer to where the leaves are. The plant sat in just water (trying to root) for a week and a half. Then I planted it in a mixture of peat moss and sand. But leaves are still yellowing and falling off. I'm not sure what's wrong with my plant.
Here are some pictures of what it looks like now: