I'm having a hard time growing Ludwigia arcuata "fast". Whereas a healthy 10cm stalk of R. rotundifolia reaches the top in about 3 weeks a comparable arcuata stem needs about 2,5 to 3 times longer under the same irradiance and fertilizer amounts (including CO2 mist). Is this normal or may I have a slow growing species? Does the arcuata need "special treatment" to get a spurt? Or is this what I'm observing simply the difference in light demand? Tank is running on round about 2w/g.
Thanks very much,
Detlef
Thanks very much,
Detlef