I'm going to be honest with you. I know you have this thing about growing stuff forever in water. And I know that there are folks on here who say they do that. But most plants that are terrestrial in nature want to grow in dirt. Not water.
I grow Spathiphyllum in water in pond muck, but they are outdoors. Not inside.
And the 64F doesn't really matter. Plants have an internal clock. They know when they should be resting (later fall to early spring) and when they should be growing (spring through fall). Even my plants in my greenhouse slow down in winter. You shouldn't make big changes until spring is really going and the light, temp and internal clock of plants has picked up. The advice you got from
@Ms.Doe is very good.
