09-19-2011, 01:47 PM
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For an amazon theme, sword plants in the genus Echinodorus are prime, there are several in varying sizes, some are in our profiles [under the second tab from the left in the blue bar]. The pygmy chain sword is ideal as a substrate cover, and will do well in most conditions. Duckweed is trouble with filters, so an alternative floating plant would be Brazilian Pennywort, actually a stem plant but it grows very well floating or you can plant it in the substrate and let it grow up and across the surface; also in the profiles, you can click the shaded name to see it. Water Sprite is another superb floating plant, native to most tropical regions including S America. Frogbit is another, though can be a bit fussy to maintain. Corkscrew Vallisneria, Dwarf Sagittaria are two more substrate rooted plants.