Sorry I didn't you were the police around here. Dude, you apparently don't know me, so back off. I used to maintain a set of farm ponds for the ambition of breeding Alligator Gar here. Um, I would say in most situations Alligator Gars don't belong in aquaria at all unless you have a tank that rivals a public exhibit. I bought it, because if I didn't buy it like some uninformed individual likely would and stick it in their 50 gallon at most aquarium, and dump it when it grew too big. In my case, nice he outgrows all my tanks, he's going into a pond.
For your information, my largest tank is 150 Gallons, however it has the dimensions to support the smaller Gar species.