Many robust aquatic plants are aquatic only for a while. They evolved to respond to flooding and to stand dry spells. You can just put the pot inside and treat

Many robust aquatic plants are aquatic only for a while. They evolved to respond to flooding and to stand dry spells. You can just put the pot inside and treat it as any other indoor plant. You could probably just let it dry in winter. Colocasia can be cultured in water and also out of the water.