I paid close to $10 for mine, which fell apart when I clipped a small piece off of it to try to propagate it. Now I have many many tiny marimo balls that mostly trap debris. The Indian Caridina shrimp I have love to live in the clump I keep the marimo balls in.The Fisherman wrote:what do they do then? they do look nice but they are kinda expensive. i paid 8 bucks for a really good quality one from my LFS..
They don't do anything. They're mostly more of a conversation piece. In fact, some people go out of their way to kill the algae that makes up those marimo balls. I've never had it spread elsewhere in the tank, but apparently in some tanks the conditions can be right for the algae to send out spores and start growing elsewhere.
To each their own. To some they're a plague, to others they're great use in aquascaping, if you can get the slow-growing stuff to grow on your driftwood or rocks, or even getting it to spread like a mat on the gravel, and some like the marimo balls just sitting around.


