I usually use the term "cooler" water for my temperate tanks... for the native fish, around here, they start having problems at close to 70 degrees F. and need to be kept cooler ... at the local fair, the DNR used to have a cool building they would put tanks into, all with chillers, and with so many people coming and going, the tanks would sweat, and fog up so bad, you could barely see the fish... I think they quit doing it, haven't seen the tanks at the fair, for several years...
