Ive got two snakenecks in with some reeves, all around 1 year old, they spent last summer in an outdoor pond feeding on minnows and loved it, they are inside for winter, I think up here they can go outside around 3-4 years old, I feed them on bloodworms and pellets when they are inside.
Dont believe the common belief that they dont bask until older, mine are always out spread eagled enjoying the heat lamps