Hi al -
My tank stays at around 75 during the winter, but it gets so hot here in Denver that sometimes in the winter it's over 80 for days or even a couple of weeks. I really don't want to have a chiller and we don't have aircon - so it's tough to cool the water.
Instead, I have fish that just like warm like tetras, etc. My neocardina shrimp don't fare that well in the summer, though.
Are there any shrimp that will flourish and maybe even be happy at warmer temperatures??? I have heard of at least one kind that loves warm water but I can't remember what it was.