American Frogbit

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American Frogbit American Frogbit, botanically Limnobium spongia, is a charming North American floating plant producing small, rounded, spongy-textured leaves with distinctive, bub bly surface texture that float in loose colonies across the water surface. One of the most naturally appealing and easy-to-manage floating plants available — it provides excellent natural shading, nutrient absorption, and surface cover for fry and shrimp with minimal intervention. Care tip: American Frogbit is a floating plant that grows on the water surface without substrate. Avoid strong surface agitation and thin regularly to prevent complete surface coverage. Temperatures between 70–82°F support healthy growth. Like all floating plants, American Frogbit grows on the water surface without requiring substrate. It multiplies through daughter plantlets that develop on runners, gradually spreading across the surface. Surface agitation should be moderate — strong flow can damage and sink the spongy floating leaves. It grows quickly under good light but remains manageable compared to more aggressive floating species. This easy plant requires no CO₂ supplementation and grows across a wide range of lighting from low to high. The temperature range of 70 to 82°F reflects its North American origin with preference for warm conditions. A pH of 6.0 to 7.5 provides comfortable conditions. Regular thinning prevents complete surface coverage and maintains adequate light for submerged plants below. In the aquascape, American Frogbit provides natural surface coverage and dappled shading that creates a naturalistic, pond-like surface atmosphere. The spongy, rounded leaves and hanging roots create ideal habitat for fry and shrimp near the surface. In open-top aquariums the floating colonies create a beautiful, natural surface display that changes as plants multiply and move. American Frogbit is a charming, easy-care, and practically useful North American floating plant for aquarists who want natural surface coverage with manageable growth and genuine botanical appeal. Its spongy texture and easy temperament make it one of the most naturally attractive floating plant options available. Care & Specifications Difficulty Easy Placement Floating Max Height Floating inches Light Level Low to Moderate Temperature 70–82°F pH 6.0–7.5 CO2 Needs Not Required Origin North America Notes Provides surface cover and shade. Easy to propagate, rapid grower. Show more