Hi Josee:
That looks like a Marine Technical Concept Skimmer, I used to have one, nice water room, you got the videos happening girl!
I love old skimmers, hate when when people say they dont work and better to be used as door stoppers. I have a Berlin XL I want to modify to increase its performance.
Amazing tank! You'll have to keep us posted on the clownfish breeding. I'm interested in trying that in the future myself.
And that microscope is a great idea! I'm sure I'd play with that thing for hours. Thanks for sharing the pictures!
Makes me wonder if I would have ever even noticed those in my own tank. Very cool find though. Any plans for them in the future? By the way, always love seeing picks of your tank.