I have a Barclaya longifolia that has pretty dull-looking
red leaves. Ditto for my Ludwigia repens. Is there a way
to kick it up a notch in color? It's a CO2 tank dosed with
PO4, K, and TMG twice a week. My substrate is plain gravel.
Would it help to put some laterite or Flourish tabs under
the roots of the red plants? What about adding chelated iron
to the water?
BTW, I was browsing through one of Amano's books last night.
One of his amazing compositions featured a lovely arrangement
of Anubias nana. And to my amazement, there was lots of spot
algae on the leaves. I hope this is a comfort to others like
me who have algae-covered Anubias leaves -- even the master
aquatic plant artist himself has it. :-)