I am keeping rcs, yellow, and snowball shrimp--hardy, but not super creatures. For fish: rasboras, otos, Dwarf PIkes, long fin bushy nose plecos, l144 plecos, and a gamut of apistos. Tank normal temp is 78 for most of them. Temp never drops below 65 on my controller.
Cold water stimulates spring rains for many fish, which promotes breeding. Temp acclimation is a crock of crap, for the most part. The big water parameters that shock fish are KH, GH, and TDS-which is directly relative to GH and KH.