Normal
I have my A. Seemanni on about 4 inches right now. If he starts to burrow I'll add more. I've seen a lot of mixed conversation about whether they burrow or not so I'm gonna let him tell me what he wants to do lol. But as of right now he's just hanging out on his leaves as well. He likes to make a mess of his water bowl though lol I've already changed it twice since I got him yesterday.