On Saturday, I picked up some Cheatomorpha from a local reefer and added half to each refugium. I may pulled out all the caulerpa in there and let this be my way of removing nutrients instead. Cheatomorpha looks like green thread, and grows in a tangled bunch that reminds me of loosely of steel wool.
The baby blue Zoanthids opened up and I got a nice picture of them today. They are green in the very center, and very tender & small. Each polyp is probably 3/16" wide in diameter.