Taxonomy and Name There is a bit of scientific debate surrounding its exact name. Scientific Name: While widely sold as Echinodorus amazonicus, it is often considered a synonym or variety of Echinodorus grisebachii by many botanists . You may also see it labeled as Echinodorus grisebachii 'Amazonicus' . Common Name: Amazon Sword Plant . Family: Alismataceae (Water Plantain family) . Origin: Native to South America, particularly the Amazon River basin in Brazil . Physical Description The Amazon Sword is a rosette-type plant, meaning its leaves grow from a central crown. Leaves: It features long, lanceolate (spear-shaped) to narrowly oval leaves that are a vibrant, bright green . The leaves have a prominent central vein and grow from a short, compact stem or crown . The classic E. amazonicus variety has relatively long, narrow, pointed leaves compared to broader-leaved relatives like Echinodorus bleheri . Size: This is a large plant. In an aquarium, it typically reaches a height of 30 to 50 cm (12 to 20 inches) . The leaves can be 2-3 cm wide . Growth Habit: It grows vertically from a central root system, making it an excellent background or midground focal point . Aquarium Care and Requirements The Amazon Sword is renowned for being an easy plant to care for, making it suitable for beginners . However, to help it thrive and reach its full potential, specific conditions are recommended. Care Factor Optimal Requirement Notes Lighting Moderate to high; 8-12 hours daily Low light is tolerated but will significantly slow growth . Temperature 22-28°C (72-82°F) A standard range for tropical freshwater aquariums. pH Level 6.5 - 7.5 (Slightly acidic to neutral) It is adaptable to a range of conditions. Water Hardness Soft to moderately hard; 3-8 dGH (or KH) It can tolerate a wider range but grows best in these parameters . Substrate Nutrient-rich; at least 2.5 inches (5-7 cm) deep Fine gravel, sand, or specialized aquatic soil. The deep substrate allows its extensive root system to develop . Fertilization Root tabs and liquid fertilizers As a heavy root feeder, root tabs placed near the roots are crucial. Liquid fertilizers provide supplemental iron and trace elements . CO2 Not required, but beneficial Adding CO2 (10-20 mg/L) will promote faster growth and larger leaves . Tank Size Minimum 10 gallons, but 20-30+ gallons is better In smaller tanks, it will require constant trimming to prevent it from outgrowing the space . Propagation Propagating Amazon Swords is straightforward and primarily happens through two methods: Runners: The most common method in aquariums. The mature plant will send out long stems (runners) horizontally across the substrate. Small plantlets will develop at intervals along these runners. Once the plantlets have developed a good root system and a few leaves, they can be cut from the mother plant and replanted elsewhere . Adventitious Plantlets: The plant may also produce flower stalks that grow above the water. Small plantlets can form on these stalks, which can then be removed and planted . Aquarium Mates and Compatibility The Amazon Sword's large, broad leaves provide excellent cover and shelter for fish, especially shy species or fry . Good Companions: It is compatible with most peaceful community fish such as Tetras, Angelfish, Discus, Guppies, Mollies, Gouramis, and Corydoras catfish. It also does well with shrimp and snails . Species to Avoid: Avoid housing it with large, herbivorous fish that are likely to nibble on and damage the leaves. This includes Goldfish, Silver Dollars, large Cichlids, and most Plecos
