Ok - I'm going to make myself the fly in the ointment here - and being an Irish hobbiest, I have a rather unique perspective that most of you don't:
The Queen angel and clown trigger has no business in a tank with either a lionfish or a frogfish...... the latter two are targets, and the former two are assasins! The angel and trigger will also get much too big for a 5' tank - and here is the point about benig "Irish" - there is not a market for a 12" queen angel or triggerfish..... so when they outgrow the tank, which is inevitable, you will be looking for a home for them, and to be honest, in Ireland, that is a difficult thing to find.
Now in fairness dallasdallaghan, you are askign for advice here, so I hope I am not comming off with a "don't be so stupid" attitude, because that is not the sentiment at all........
For the tank size you are looking at, I woudl rule out anything with the potential for 12" or more - with the exception of lionfish and morays etc...... they are different.
The Harlequin Tusk is a nice fish, gets quite big, but nothing like the trigger or angel you mention. I have an emporer angel that I got about 8 months back - he was 3" then, he's 6.5" now - and his attitude has doubled with it. My tank is 8x2x2, and I really would not fancy putting him in anything smaller..... maybe a 6x2x2 if it was lightly stocked. THe queen gets much bigger, much quicker, and is much more aggressive.....
My advice to you, if you want a stable long term project, is to opt for either "aggressive" OR "predatory" fish. Generally, the two don;t mix all that well - with the exception of groupers maybe bridging the divide...... "predators" tend to be slow moving, non aggressive, and are easy targets for "aggressive" fish...... if you think that a lionfish's spine will protect him, think again.......
So basically what I am saying is, either:
(1) Get liongish, frogfish, groupers, morays etc.
OR
(2) Get triggers, puffers, angels, wrasse etc.
I am not saying it cannot be done, but typically speaking, it is probably better avoided. Just keep in the back of your mind, what would you do with a 12" fish, if you no longer want it for any reason? We in Ireland do not have the luxury of selling it to the big fish enthusiast at the "local marine aquarist society", as our more fortunate friedns in the US do..... it really is a "fish for life".....
HTH
Matt (in Cork)
