Ok a few things.
1. What size tank is this? It looks like a 45 or so???
2. The tangs are going to be WAY too big for that tank especially the Sailfin (12+" full grown) The Eel is going to be 24"+ full grown
3. What kind of light do you have on this tank? RBTAs and other anemones require high lighting.
From what I'm seeing in the pics your tank is overloaded and that is going to cause you a lot of problems and very quickly. Anemones need very stable water conditions, excellent lighting and a very established tank. A tank that is only 6 months old should have maybe 2 fish in it and no corals or anemones.
Now with that said (not trying to bash you) what I would suggest is to take back several of your fish, or give them to someone with a larger tank. I can see in the pics that you have some algae growing and your tank looks a little cloudy. How often are you doing water changes? How often are you changing the carbon in your filter? The air pump I assume has a bubble wand or air stone attached to it? That is not needed in a SW
tank, it kinda turns your tank into a giant skimmer. Bubble wands and air stones are more for FW
tanks. Really the best thing you can do is to get most of those fish out of there or get a much larger tank (most of the fish you have selected need tanks 120g+) that is going to lessen the likely hood of a crash.
How often do you test your water for ammonia? With that heavy of a bio load I expect you have ammonia in your tank. As for the amount of liverock you want 1.5 to 2lbs per gallon for good filtration.
Sorry to sound like I'm yelling or being mean but you are way overloaded and it is going to cause you a lot of headache if it hasn't already.