You say you just set this system up. How long ago did you start?
I'm asking this because you seem to have a lot going on in a very short time.
Equipment first. The wet/dry is a potential problem. Reef tanks of yesteryear used wet/dry's. Now that we use LR and protein skimmers to process ammonia, nitrites, nitrates and dissolved organic compounds (DOC's), wet/dry's have been discovered to add to the nutrients in our tanks. They trap detritus and in doing so actually become a nutrient sink (adding nutrients to the water moreso than removing them).
Your PC lighting is on the low end of acceptable for an anemone. Which, on the other hand should be added to a tank that has had an opportunity to mature. Some people suggest waiting as long as a year before adding one. The corals (softies and polyps) that you're stocking is absolutely fine with PC lighting. The anemone and hard corals (if you decide to go that route) require more than PC's.
You already know the story on adding a mandarin at this time (as you eluded to). A HOB fuge is very small for pod production and having it set up for six days at this time is a good 8 months short of mature. Same thing with the crushed coral. Why?
If you haven't seen any aggression from the maroon clown yet, just keep an eye on it. They are one of the most aggressive fish in the clown family.
Your choice of snails, crabs, shrooms, zoos and polyps are great.
IMO you should consider slowing down a lot. Without knowing the exact date you started, it just appears that you're rushing things a bit.
Feel free to ask questions, preferrably before you make any purchases, and join in on our discussions. There is a lot to learn in this hobby. The first thing is, bad things happen very fast and good things take time.
Good luck,
swimmer