Echinodorus Tenellus (Pygmy Chain Sword) is a great foreground plant, although a true lawn effect will only be achieved with high light intensities. Size: 5-10cm Optimum pH: 5 - 8 Lighting: At least 2 watts per gallon Temperature: 19-30 degrees celcius Difficulty: 3 (1 = Easy 5 = Difficult) Plant Arrangement: Foreground Supplied in a small pot with mineral wool.