your marimo might have a tear, you can try binding it with rubber bands for a while, this’ll help the algae reconnect!!

fill a container with tap water and let it sit out unsealed for a day or two before using it, boil water and let it cool before using, or use bottled water 🌱

marimo’s usually so fine in tap water but it can depend if you have unusually hard water (water with lots of chemicals & minerals)