A 2ft width will last a very long time. Probably for life but a 30" width would be ideal. Most Florida/spotted gars don't exceed 24" in aquariums. I like the dimensions of that 300Lep looking forward to seeing that video. Saw, the length should be fine however the width is the one thing i am unsure about. I would say you would be ok however i will leave it to someone with my knowledge to answer that.