what do moss balls do
2. There are Marimo Moss Balls and Moss balls (java rolled onto a styrofoam ball). Marimo moss balls are pretty cool, low maintenace, and I have several of them for a very long time. All plants utilizes nitrates. In my 100g, which is heavily planted, nitrates don't show up when I test the water.arimo moss balls are pretty cool, low maintenace, and I have several of them for a very long time. All plants utilizes nitrates. In my 100g, which is heavily planted, nitrates don't show up when I test the water.