Attached is a pic of my Razor or Sawtooth Caulerpa which I added to 55SW the other day.
The tips went white for an hour or so then green again, and lo and behold, the ever-present film on top of my water was GONE.
I had been skimming normally and stuff prior to this but the film was always sorta there. Now it is is gone and has not come back.
Being that this tank is fairly new (3 mos old) I spose the Caulerpa absorbed some nitrates and whatever was causing the film... that is why the tips went white for a bit?
Any thoughts? Everyone seems to like the Caulerpa inluding the crabs and snails which climb through it and pick tiny bits of hair algae off of it.
A link that I found: