Yamoto/Amano

[kennyman]

My new brackish tank is sitting there awaiting a filter and heater. But a new clothsdryer is higher on the list so the tank is going to have to wait. I really want to get some life into this tank. I read somewhere Yamoto shrimp are a temperate climate critters Could I get some opinions on how well they will do in an unheated tank please?
The temp is staying steady at 65deg ( yea im saving on my oil bill)

Also I have Vallisneria, Java Fern and Java moss to go in there. Will any of those take the cool water?