Interesting - so the tank they were in when I purchased had Marimo moss balls in it - I guess that is probably the source of the cladophora. Whatever it is, it makes them beautiful. I guess I have no Marimo so chances are they will change back to normal color soon... Oh well.I ordered some from msjinkzd just last week that came in deep blue. Apparently it's from eating cladophora algae.
Old thread bump, but one of my Amanos is suddenly red. Not slightly pink, but deep red. It seems to be doing fine, though -- it's eating and moving around normally.So cool. If only they had algae that you could feed amanos to make them red.