Growing Utricularia gibba: Water, Maintenance, and Fountain Fixes

A Michigan grower asked for care guidance on Utricularia gibba kept in a 10-gallon container with a fountain. They were using spring water, unsure about cleaning frequency, and the fountain pump kept sucking in peat moss and even the plant itself after a filter box was added.

Expert Jeff Dallas provided clear, actionable advice:

• Water: Use only distilled, demineralized, or reverse osmosis water. Spring water contains dissolved salts that will slowly kill aquatic bladderworts.
• Cleaning: Drain and rinse the container every 2–3 months. Refill with pure water and reposition the plant so it contacts the peat layer at the bottom—U. gibba naturally grows along substrate edges, not free-floating.
• Fountain: Remove it or use a double filter box. Better yet, skip the fountain entirely; periodic manual cleaning works fine.
• Feeding: Add a tiny amount of aquatic plant fertilizer at ¼ strength if desired.

With pure water, a stable setup, and minimal disturbance, U. gibba thrives and flowers readily.