Dividing Peace Lilies for Betta Fish Planters (Aquatic Terrariums)

Yes, you can divide a peace lily (Spathiphyllum) to create a planted betta vase—a popular setup where the plant's roots grow in water, providing filtration and a natural aesthetic for the fish.

How to Divide Successfully

1. Remove the plant from its pot and gently wash away soil to expose the rhizome system.
2. Identify divisions: Each "crown" with its own roots can become a new plant.
3. Cut cleanly: Use a sterile knife to separate crowns, ensuring each has healthy roots attached.
4. Rinse roots thoroughly to remove all soil—critical for water clarity and fish health.
5. Place in the vessel: Support the crown above water (use pebbles, a plastic collar, or the vase neck) so only roots are submerged.

Care for the Combo

• Light: Bright, indirect. No direct sun (algae bloom risk).
• Water: Change weekly or when cloudy. Use dechlorinated water.
• Fish care: Feed betta sparingly; uneaten food fouls water. The plant absorbs nitrates but isn't a full filter substitute.
• Fertilizer: None needed—fish waste provides nutrients. If leaves yellow, add a drop of liquid aquarium fertilizer.

Peace lilies adapt well to hydroculture. Both plant and fish benefit from this symbiotic display.