Well nobody has said anything about two of your purchases, so I'll have to be the one to say it unfortunately.
Your "Froggy" mandarin you have there....it will die ultimately of starvation. It requires a tank of about 75 gallons. They feed only on copepods, and that is something he'll eat up in your tank and then it'll run dry, and basically starvation happens.
I also do know this because of the fact, my girlfriend bought one for her 12 gallon jbj, and I worked my ass off to get it to eat prepared food. I was successful in it, but I couldn't win. I couldn't keep up with it's constant necessity for food, and with their primary food source, gone, it's belly sunk in, and then it began twitching...then died and became snail and crab food.
Lastly, that flowerpot, it dies too. It's just one of those type of corals that dont live long. For kicks, my girlfriend bought one for her tank. (it was a yellow one) and it died within a month. The green species you have, perhaps may live like 6 months, or so, depending on age.
So I know this from experience and sharing it to you. Also Incysor and Johnanddawn have mentioned lots of information on the mandarin and on flowerpots.
As far as everything else, all else looks fine and your tank is taking great shape. Best of luck and welcome aboard.