According to the details on these fish here on PC, their temperature range is from the 60's up to 72F, so they should like a cold water change and we seem to be lucky that they are ok with the mid yo upper 70's.
I had them at 80 for a while, no problem. When they spawned the first time (successfully) I did a cold water change to drop the temp from 75-65. They got active right away and the eggs came right after lights out.
I wonder if a spawning mop could be used? I used java moss, but it was a bit of a pain.