There are several codes that may typed into the game to cause cosmetic or helpful effects. To enter codes, players will need to be at any aquarium screen (with the exception of "give"). The codes do not show up as they are typed and are entered in all lowercase with no spaces. Codes may be typed in again to undo their effect in a toggle fashion.
| Code | Effect |
|---|---|
| Give | Allows players to transfer shells to another user. Only works in the main menu. |
| Prego | Replaces Prego's flatulence sound with a rubbery "squeak". |
| Space | Replaces the tank backdrop with an outer space backdrop, same as the one used in the final Zuma (another game by PopCap) stage, 13-1. |
| SuperMegaUltra | Replaces Prego's sound with an even longer, louder sound. |
| Time | Displays the time lapsed at the bottom. |
| Void | Removes the tank backdrop for a blank, white space. |
| Wavy | Grants a rippling water effect to the tank. |
| WeLoveBetaTesters | Replaces the breeders' pop sound with Prego's original sound. |
| Zombie | Makes all fish appear dead despite being alive and well. |
Sandbox Mode[]
Once the seven pet maximum upgrade has been purchased and at least a silver trophy has been obtained, players may enter the Konami Code to access Sandbox mode. From the main menu screen, input the Konami Code on the keyboard. By entering the Konami Code, players increase the Virtual Tank pet limit from seven to 11.
| Konami Code |
|---|
| ↑ ↑ ↓ ↓ ← → ← → B A |