Marimo moss ball with tufts
I bought my moss ball from The Sill about a year or so ago. For the past couple months, my moss ball has developed tufts and is uneven, instead of smooth and doesn't look too healthy. It's still a dark green instead of brown or black in parts. I clean the bowl it's in about once a week, use cold water from the tap, it's not in direct sunlight. I use soap to clean the rocks in the bowl, but I make sure that all the residue and the bubbles are gone before I put the moss ball back.
I'm not to sure how to fix this or if I can. Does anyone have an idea of what is happening?