So here's how the tank currently looks. I'm using it for an observational study of multiple starfish species of the Fromia genus and want it to be as natural as possible so was wondering if anyone had any creative ideas. I was thinking about some macroalgae in a corner covering part of the sandbed as well as some rubble substrate on the bottom in one spot instead of only a sandbed. There are currently 3 stars in there but there will soon be 2 or 3 more. Any other ideas? Btw, if you want to see some of the starfish just lmk and I can link my other thread following the study.