Thanks very much
I have definitely lost a little perspective/depth with the plant growth you're right. It's sort of hard to plan for such a small space(6"x6"x6") I may fill the back with more of the rotala I'm not sure. And I may be able to regain some slope once I trim the fissidens. The plant you're asking about is Hygro pinnatifida. I'm going to trim off the tallest leaves at some point and that will leave 2-3 miniature versions of it behind.