2 tanks. One a standard community setup (Guppies, Neons etc) running at 25 degrees. Next one has Cardinals, Rummynose and Discus, German Blue Rams (Wild Caught) and is at 30 degrees. The Gold ones die after a month everytime in the 30c tank and always seem to be gasping for breath, yet they're fine in the other tank.
I know people argue about the GBR temperature, but the Golds I feel are fine at 25-27c. Tank Bred, Raised and most are at lower temperatures.