Tanks going black

[Splashy]

Hi,
I'm a new user of Goldfish Aquarium 2.
I want to disable the tank going black (automatic lights - burn-in protection?).
I disabled automatic lights on each tank but for some reason, some tanks still appear in black.
Any ideas would be appreciated.
TIA,
Splashy.

Update: problem solved. The lighting wasn't adjusted properly in the tank that was black.