great pics xander, and the TPGs are looking very good as well!
haha thanks!
that being said, you are nuts for doing this. i assume the gator gar was one of the past and not in there now? if it's the former, ok, if it's the latter, then that's even crazier given the ambition of smaller gators as they grow.
i think what you have going for you right now is that you have ~5 TPGs...so if 1-2 get eaten you will have a few left. definitely not a combo i would do, especially with the rarity of those gars...space is not really an issue correlated with predation when it comes to larger gars IME and many other cases i have checked out.
story behind the gator gar, 8-12months ago i passed a 6" gator to a friend. a week or more ago i got it back...(wait for it)...at 8". i did not want to risk it with my 5" trop, so into the main tank it went. after a while it was still not bothered by the cubans, and since the larger trops did not seem to be doing well in the 15gal (4, 9" trops and 1, 5" trop makes for a VERY cramped 15gal), i decided to let them out. definitely agree that space is not correlated to aggression. and with any other gars i wouldn't even dream of doing anything this retarded (i've kept, for varying periods of time, 6 adult cubans, and the difference in aggression between this pair and the rest was very obvious).
back when the Croc II was only about 12-14" long (and much slimmer) it went for one of the newly imported (first 2005 group) that was about 6-8" within the first day.
from what i've read, seems like croc II's a pretty mean fish. this isn't the first time i've done this actually, i used to have numerous small floridas with these cubans back in the day.
but i get what you mean.
your fish, and you have your disclaimer, but not a great decision by any means. ok i'm done with my lecturing for now

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--solomon
PS-- wanted to add to this that i won't even add my ~12" CBG group to Gar-Den I...and those fish are much smaller (the current residents) than your gars. GDII is absolutely out of the question as they would be Croc II or large CBG food in a matter of days at best.