I bought some Marimo and made a carpet out of it. Some of my shrimp got berried and now I see baby shrimp. My dwarf hairgrass didn't do to well, so I had to take most of it out. The marimo ball was about the size of a golf ball, and as you can see from the picture, I was able to get a lot of little marimo balls from the main one. I also got a new piece of driftwood, which you can see in the picture resting against a coconut shell.