I have been advised that the temperature for these fish is critical and that they need the water cooled and heated to maintain exactly 28 deg.
How true is this? My tank is currently 32 deg (summer in Aust) and the of fish are surviving well.
Water temperature between the range of 26 to 30 degree C should be okay.
The change of water temperature should be gradual.
Sudden change of water temperature will stress the fish.
It will give you endless of problems after then.