Hello treky215
I also grow pothos in water, in glass vases. But I modified it a bit using water gel beads or sometimes I combine clay rocks withe the gel beads. Roots needs to be moist and get good air below. So having the gel beads works great, there is always something for the roots to absorb moisture from, water does not get stinky too. When the gel beads shrink in size, I just add some water again so it will inflate again. I just use ordinary tap water.
Looking at your plant, try to position them away from direct sun, it is a low light plant. Sometimes I just have to make quarter turns of the vase, just to even out the growth as the leaves reach out for some light. I also trim away old leaves as they go, and sometimes, I may have been bad forgetting to check the vase, so the roots tend to dry up, but once moistened again, the plant recovers. They slowdown a bit in growth during winter, and resumes active growth again in Spring.
Here is mine:
