+1 Everybody...Reefing is a marathon not a sprint. I'll try to give you as much insight as possible.
Your tank is new so it has "new bacteria" in it. the bacteria is in the water. It's part of the natural lifecycle of things. But when you have a fish tank and the bacteria is new, it doesn't have the ability to eat all of the bad stuff. (picture dropping a T Bone steak in front of a newborn)..It would love to eat it, but it just can't.
But as your tank gets older, the bacteria increases and can handle a bigger "bio-load" (that's the nice word for fish poop). When you have alot of bacteria in the tank, you get a stable system.
That being said, there are living things (like your anenome) that cannot handle large swings in the water quality, (due to new bacteria not being able to keep up)..and for that reason they die (possibly the Trigger) (definitely your anenome)
Anenomes shouldn't really be kept until the tank is a very stable system, some people (and I'm one of them) think this should be at least a year. The reason? An Anenome is filled with toxins, when it dies it releases those toxins, which have the potential to "crash" or kill everything in the tank.
On to the Clownfish- As a general rule, you should only have 1 pair of clownfish in a tank. They generally will kill each other over time, and you just happen to have tomato clowns, which are just about the meanest SOB's on the planet. That being said, you tank may be big enough, but we'll see.
So, as the others said..Slow down, let nature take it's course so to speak. Believe me, I also have a 180g tank. You're not going to fill that thing up overnight.