Goldfish Aquarium 2 - Display Problem Fix for Windows 10 & 11
 

For those who may be having the same problem:

With my PC resolution set at 1920X1080, in Windows 7, Goldfish Aquarium 2 displayed perfectly. However, with the same setting, in Windows 10 and 11, it looked zoomed-in and failed to show a good part of the aquarium on all four sides (see 1.jpg). To get it to display full screen, as it previously did, in the "Goldfish Aquarium 2" settings I had to set "Windows Resolution and color bit" to 1024X768X32 (see 2.jpg), while my PC resolution remains at 1920X1080.
Now the entire aquarium displays and fills the whole screen (see 3.jpg).

Thanks for the tip.

You're welcome. Actually, my Goldfish Aquarium 2 has been only partially displaying, as shown in my attachment above (1.jpg), ever since I upgraded to Windows 10. Then for a short time however, for some unknown reason, it fully displayed, but again for a short time.
I had assumed I couldn't do anything about it. Recently however, since I upgraded to Windows 11, I started fiddling with its resolution settings and finally, lo and behold, by changing its resolution setting to 1024X768X32, instead of the previous setting of 1920X1080X32, as pictured above (2.jpg), it now displays fully and fills the entire screen.