how often are you suppose to dose with the root tabs from bob's tropicals?
Ludwiga repens and arucata, I've seen that they grow really red (both from pictures and people's tanks). Also noted that rotala rotundifolia grows really pink/red but I'm not getting that either. I was wondering why.
I keep both of these under similar conditions - mine haven't gotten too red either (especially the rotala). Doesn't bother me too much though :l
IME L. repens and R. rotundifolia/indica don't need much to get reddish...but most times I was dosing ferts in some way.