Originally Posted by SinCrisis
how about maintaining the cooler water? Are we supposed to unplug the heater to keep the water from heating up too much?
No,to encourage spawning,, you simply perform water changes perhaps twice a week with slightly cooler water. No need to turn heater off.
Tropical fishes need stable temps day in,and day out. The cooler water at water changes, is ONLY to encourage spawning with some species.
If you live where water in tanks get too hot during the summmer, then perhaps no heater would be necessary, but evening temps should not drop so low as to cause significant temp change.
Sometimes fans blowing across the surface of the water are needed during summer, or when AC breaks down to keep temps from climbing too high depending on where you live or where tanks are placed.
Moving tanks, or keeping them in basement often is what those who live in very warm climates do.