Try to get temp. readings of the water...
That will determin stock list, but I would think and fish w/a decent body mass could live in the deeper depth during cold spells.
I had a Florida Gar, 2 O's, a pair of convicts, Wood Cat, and Striped Rafael livng for years in an unheated basement tank. The water was in the mid to upper 60's at times. The only "effects" on them were lowered metabolizm and less activity.
That will determin stock list, but I would think and fish w/a decent body mass could live in the deeper depth during cold spells.
I had a Florida Gar, 2 O's, a pair of convicts, Wood Cat, and Striped Rafael livng for years in an unheated basement tank. The water was in the mid to upper 60's at times. The only "effects" on them were lowered metabolizm and less activity.