I think in that 10 by 4, you could maintain any six of the smaller species for life. Or you could maintain a GATF for life. That's it. The tigers or the GATF and nothing else. You'll also need to run stupid current through the tank to keep them happy. That is assuming of course that the manna from heaven idea of yours is able to mitigate their natural tendency to want to be intolerant of their congeners as they get larger.
Why just the one GATF in a 10 x 4?
I have no desire whatsoever to keep a Gatf. I fell in love with Tigerfang's group, and really only have interest in keeping Vatfs and Tatfs.
I believe keeping nothing BUT Tigers in the tank is a bad idea. I've always used Dithers and until I see negative effects I will continue to. Hell I spent half a decade growing Dithers for this project dangit, I'm going to use them!
The "manna from heaven idea" of mine isn't to mitigate their natural tendency to want to be intolerant of their congeners as they get larger, but rather to simply see if this natural tendency to kill each other when larger has anything to do with the amount of food available.
You seem to be a firm believer in what happens in the wild will also hold true in our glass cages and I simply disagree.
Look at the history of some of the predatory fish we keep.....
Armatus were thought to be solo only fish. After the price fell on it's face its now common place to see multiple fish kept together despite all of us seeing Jeremy Wade pull a smaller one out of a larger one's mouth making it obvious they will prey on each other. Does that keep people from keeping multiple fish together? Nope.
Aimara are the most aggressive freshwater fish on the planet. Known to kill anything that hits the water. When I got my Aimara 2 years ago and decided to keep it with rays how many people here do you think thought it was a good idea? NONE. 2 years later this combo has brought me more joy then any other combination of fish I've ever kept. How many do you see in community settings these days?
Do you think a Hawaii Dragon Moray would be tolerant of another eel small enough to eat "sharing" his rock lair in the wild? Nope. It would be lunch. However when kept well fed in an aquarium you can mix them with eels small enough to eat with success. Maybe it's coincidence, but maybe it has to do with the amount of food available?
Ever thought that the amount of food available in the wild has anything to do with why fish become intolerant of each other once the reach adult hood?
Are Odoe intolerant of each other as adults? Cause I believe these fish do better when kept in groups. How are we so sure ATF are any different? Didn't Mr. Wade show us their natural tendency to hunt as a pack? While on the subject of Odoe isn't it kind of weird they obtain roughly the same size as the non goliath ATFs yet only require what? 1/5 the tank size as ATF?
And on the subject of a bigger tank.......
I live in a rental house. I've changed jobs a bunch trying to find an employer capable of keeping me busy. I am limited to tanks I can move in and out of houses I rent. I've found a job I'm happy with and will likely begin looking at houses soon. IF I save what I spend a year on the hobby I've got the only thing holding me back, a down payment. A house may be a few years out, but let's be realistic, how long will it take for a V/T ATF to "outgrow" a 10x4? Once I have the house tank size won't be an issue. I take this hobby pretty seriously. Anyone that's seen my filtration systems or stock lists know this. What I'd like to build would be in the 5 digit size for gallons, but may have to settle for something a bit smaller, but a few thousand gallons should be no problem at all, pretty sure the filter I have now would be plenty for it.
I guess I just thought this community would be a little more supportive of an idea like this. Just seems kind of ironic how many people are keeping ATF on a small scale but when someone wants to go big with it, all of a sudden it becomes a bad idea?