Just 1 FLG (Lepisosteus Platyrhincus) about 9-10 inches long. I recently upgraded his home from a 55 to a 199gal tank and his only tankmate right now is a Pleco that's about a foot long. i know most of you guys don't like to feed your gars live food and train them to eat pellets, but I like feeding my Gar live fish and he likes eating them so I feed him minnows and goldfish (flame away if you feel the need). I also plan on getting a few more gars for that tank in the near future.
Well, since you asked for it, the pleco is not a good tankmate for your gar. Your gars life is at risk.