All of the blyxa japonica completely melted, even though everything else is going well. I've heard that sometimes blyxa japonica just melts away? In any case, I've got some subwassertang coming in the mail in the next few days that I was thinking about putting where the blyxa was to fill up that space. I'll post pics when it happens. I've read it's pretty easy to take care of and that shrimp love it, so figured it would be a safe bet!