Ceratophyllum demersum has whirled leaves which are densely crowded at the apex of beautifully branched stems, whereas internodes may exceed 3 cm in length at the base of older stems. Ceratophyllum demersum is an obligate submerged perennial plant which does not form roots. In Nature it is usually found buried in sandy to silty sediments where it anchors itself by modified leaves. Ceratophyllum demersum often forms monospecific populations and is found down to 10 m depth as individual very slow-growing plants. In the aquarium, on the other hand, it prefers relatively high light, and it does not tolerate transportation for extended periods. It excretes substances toxic to algae (allelopathic behaviour) and at good growth conditions it efficiently inhibits most algae growth.

Part of the world .. Cosmopolitan
Temperature .. 10-30ºC
pH tolerance .. neutral-basic

• Hardness tolerance .. average-hard
• Easiness .. easy
• Height .. 15-50cm . Width .. 5-25cm . Light .. average-high
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• For deliveries outside the UK telephone +44 116 267 7091 . In order for us to obtain plants fresh from the nursery please allow up to 14 days delivery
• key .. about tropical aquarium plants
• planting an aquarium .. achieving a sense of balance
• rock and lava plants .. plants that grow naturally on stones and tree roots
• algae in aquariums .. containing algae in aquariums in aquariums
• aquarium gallery .. a selection of aquarium planting schemes