Cilantro is coriander, I'm not 100% sure on safety but it's not rocket. You're thinking of arugula cypher
Have you considered cat grass? That's the thing I see people wanting to plant most often. I personally think live plants look like more work than they're worth, with the moisture and extra water and especially considering the mess Cc manages to make just with hemp and carefresh, I think if I gave her soil as well her tank would look like a swamp in minutes. Keep us updated though if you can get it to work for you!