Difficult but I reckon
Scientific name Echinodorus sp
Common name Amazon Sword
Origin South America
Aquarium use Background
Lighting Medium-Bright
Temperature 15-30oC (59-86oF)
Water chemistry Not critical
Substrate Plain gravel or sand may suffice for some species, but most will require a nutrient substrate or 'root tabs' to thrive.
Or
Echinodorus bleheri
Family Alismataceae
Continent South America
Region South America
Country of origin
Height 20-50 cm
Width 25-40 cm
Light requirements low-very high
Temperature 20-30 °C
Hardness tolerance soft-hard
pH tolerance 5,5-9
Growth fast
Demands easy
Echinodorus bleheri is undemanding and beautiful. A nutritious bottom promotes growth, but the plant needs pruning to prevent it depriving plants underneath of light. E. bleheri does well even in poorly illuminated aquariums, as it grows towards the light. It is a hardy and easy solitary plant for both beginners and the more experienced with quite large aquariums. It has been sold under the name ''Paniculatus''.