youll only need the smallest wattage heater for such a small tank. the 25w heater i got for my 5g fry tank was £11, that would be about $21 so not too expensive.
couldnt help you on whether your room temp is high enoguh though, im sure youd find out online quite easily what temperatures different shrimp like
couldnt help you on whether your room temp is high enoguh though, im sure youd find out online quite easily what temperatures different shrimp like