Mystery Creatures in Pothos Water Vase: Harmless or Harmful?

What Are Those Worm-Like Creatures?

Without a photo, exact identification is impossible, but the creatures floating in your pothos water vase are almost certainly harmless. Common inhabitants of stagnant water include:

• Mosquito larvae (if water sits uncovered)
• Drain fly larvae
• Beneficial nematodes or micro-invertebrates
• Simple algae or biofilm aggregates that resemble worms

None of these damage the pothos (Epipremnum aureum) itself, which roots happily in water.

Simple Solution: Regular Water Changes

The best prevention and cure is replacing the water every 1–2 weeks. This:

1. Removes larvae, eggs, and organic buildup.
2. Replenishes dissolved oxygen for healthy roots.
3. Prevents foul odors and algae growth.

When changing water, rinse the vase and gently rinse the roots under lukewarm tap water. Trim any mushy, brown roots before refilling.

Long-Term Tip

Consider transitioning your pothos to a well-draining potting mix. Soil-grown pothos are more vigorous, less prone to root rot, and eliminate the "creature" issue entirely. If you prefer the water look, add a few drops of hydrogen peroxide (3%) per gallon during changes to suppress microbes.