The moss ball will sink to the bottom of the tank within a couple of days. Marimo can lose their round shape due to a lack of agitation in the water. Remember, it's the wave motion that keeps them ...

KUSHIRO, Hokkaido—“Marimo” moss balls, the fuzzy green spheres ... with a diameter of 15 cm and a thickness of 4.1 cm in an aquarium for about 290 days from December 2019 to September ...