sorry to jump in on this post Im not AW but I can help you with this if you like. as for the list of you have posted
volitan lion 4"
yellow tang 4"
snowflake eel 5-6"
panther grouper 3" and how long till outgrows 125
the one i see that would be a true waste would be your yellow tang if its smaller than the 4 inch you specified make sure it IS at least this big when adding it so your lion wont outgrow the tang and make it a meal. you will find all these fish to bell well compatible in a 125 as for the grouer they dont grow extremly fast so you can have it for a few yrs before needing an upgrade.when buying any of these fish .make sure you see them eat before purchasing lions and eels especially can be tricky to get to eat if they are not from another well adjusted tank.I have had or do have all of the fish listed. oh yeh just a word of caution for the grouper .they are eating machines if it fits in there mouth they will eat it.most people dont keep panthers if they dont want high feed bills they can and will eat you out of house and home.but other than that they are cool fish.and very hardy.
what I have in my 125 is
panther grouper bout a ft long
large vol lion also ft long
spiney boxfish puffer
lunear wrasse
silver scat
bi colored foxface
black moray eel
niger trigger
black brittle star
No clean up crew my scat and foxface do that job very well
I have had all of the fish almost one yr in this tank the scat I have had for 4 yrs
if you concider wrasses or triggers make sure they are add last to the tank they are very aggressive and extremely territorial.I do have 2 other tanks set up if you would like information on other species that I may have feel free to ask away
my tanks range from agressive fowlr and reef and I also keep a bamboo shark.
feel free to check out my photo albumn of my tanks
http://unleashed.myphotoalbum.com/