Bought that gar as a shortnose, but people who know more than I do think it's a longnose.
For feeding, I try to give a good variety. They're not picky eaters by any means, but some things they like less than others. They really like:
Hikari: cichlid gold and bio-gold, and the carnivore sticks
Omega One pellets - just pick a size they can handle
Azoo carnivore sticks
Tetra Jumbomin (my guys are pretty good size now)
Tetra cichlid sticks
Once a week or so:
FD Krill or plankton (depends on size of fish), or
mealworms, earthworms, crickets, etc
Frozen bloodworms when they were smaller
Warmouths are a somewhat more pisciverous -- occasional safe feeders, frozen silversides or prawns. Amazing what they can swallow. Remind me of young oscars, only more shy.
Once in awhile some chopped spinach, or cauliflower. Haven't yet found any veggie pellets that they like.
I really like my group! Good luck!