I have some wccm both Honey and silvergreen common wcmm in a community tank ( at 20* c 70*f). I would like to put them in an outside pond ( circa 60litres) until the temp drops too near the 40*F minimum. I assume I would have to acclimatise them to this lower tempreature outside( measured at 60*f this evening). And ,I suppose reverse the process to return them to the community for winter. I have a spare tank that I could leave unheated indoors to let them acclimatise. The pond , At the moment , sans filter and heater, I plan to care for with regular water changes only. If this is do-able I would consider a filter and heater for a longer time use but would make that the subject of another thread.