i used to keep and breed Macropodus opercularis (paradise fish) in rain barrels in Wisconsin April thru Oct, and they worked well (not the line bred, but wild type (hardier)), they helped to control mosquito larvae.
Being from Korea and China, they tolerate temp swings, and having the labyrinth breathing organ, can tolerate th low O2 levels found at depth when not using some kind of air or water pump to facilitate air exchange.
Bottom dwellers will struggle without water movement.
A weather loach would be a better choice (cool tolerant, also from northern Asia) but an airstone may still be needed to prevent anoxic conditions at depth..