Some zoas on my frag rack. Growth is rather slow... you can see that I really struggled with GHA. The frag plugs are covered with them at one point. Now its much better, but can be improved. I would occasionally pick up a turbo snail and set it on the rack just to force it to eat the "green green grass".
Its mainly zoas for now. Have to depend on lots of super glue gel though... I have turbo snails and hermit crabs as cleanup crew, so you get the picture.
Thanks! I'm actually tracking yours too! I ever considered building an acrylic tank, but the thoughts of me carelessly causing scratches made me drop the idea.