I have second level environment and food. Bred two fish to get the #4 magical fish(oriental goldbulb) For some reason, when they're born, I have to use the vitamins on them, no biggie. BUT seems that when they hit 10, they automatically die. They had 75% health, were at 100% feeding, and I never left the computer or switched screens. I've tried keeping them stocked in vitamins, they still die.. I've tried letting them go without a dose close to about 9 yrs and they still die.

Any ideas on what's going wrong? I've bread 2 other magical fish, and they've been fine all the way to adulthood.

TIA!