I asked this question a few months ago, and many people told me to try 1 coral plus, 1 purple plus, and 4 blue plus. I haven't tried it yet, but that's what people told me on multiple forums.
I have fern caulerpa, grape caulerpa (I give these out free with purchases of other macros since there aren't that many grapes on it- lots of vines), caulerpa prolifera, and chaeto for sale right now. PM me the combo you want.
I think those are the outlines of his organs. He might be a little thin. Did you just get him recently? Whenever I get new fish (especially tangs) they have those bumps and then within a few weeks they'll fatten up and those bumps should disappear.
All of my caulerpa packages have been sold. I still have tons of chaeto. I can sell tennis ball sizes of chaeto as well as golf ball sized. Just PM me which one you want!
Are you sure you want that many shrimp? It should be ok, but there could be some fighting. Have you looked into cleaner shrimp or blood shrimp to try? I think in a 20 you can have up to two small fish. A clownfish and one more fish should be ok. Clean up crew maybe at most 5 hermits (I...
Technically you could add fish now, but if I were you I would wait an additional week and do another water change, just to be safe. You cycled your tank right?