thaks friedrich bitter i've have since august 2011 totally submers a very very similar crepidomanes (think is the same)
i've it in 3 differents aquarium (respective 10x5 cm, 5x5 and 3x3 cm portions size).
light: 0,25 w/l - 0,5 w/l
water: ph 6.2-6.9, gh 5-6, kh0-1, 200-300 ms
fertilisation...