A lot of mosses work well in shrimp tanks. Shrimps especially love moss for the microorganisms that grow on them.
How did you obtain the cardamine? It could've possibly be melting from emersed growth. You shouldn't have to worry much though, since it's sure to bounce back. Cardamine grows really fast.
How did you obtain the cardamine? It could've possibly be melting from emersed growth. You shouldn't have to worry much though, since it's sure to bounce back. Cardamine grows really fast.