It looks like Phyllis has gotten with the program and started eating aiptasias. The trick now is deciding how long to keep her in the display. I wish I could keep her, but she's also nibbled on my gorgonian and she isn't a caribbean species. I looked at caribbean filefish, and the only one small enough to consider includes seagrass in its diet. Regardless, it's a fish I recommend, for both its utility (aiptasia eating) and its entertainment value. Kind of a fun cross between a seahorse and a flounder! With a larger tank, a small school of them would be awesome. Plus, they're easily sexable.
I have fond memories of wondering if I had too much caulerpa. Now that I've gotten it down to a much smaller amount, I wonder if I have enough. I'm concerned it will be replaced with micro algae, if the seagrasses alone don't soak up enough nutrients. The tank looks a little stark, compared to the jungle of macros I had months ago. One factor that should help is the ever-increasing biomass of sponges. These simple creatures have an amazing capacity to naturally filter seawater. But I do admit, I miss the variety of macros I had before.
This brings me to the question of Zippy, the atlantic blue tang. One of the things I said when I was considering getting one, is that if he was too destructive, I'd remove him. If his actions leave me with micro algae in place of caulerpa, then I think I may have reached that point. As he grows, my tank seems less likely to be big enough to support him. Pulling him out would allow me to add some other fish I'm interested in"¦