The redeem button steps live on the codes page. This note is only about timing.
Most active community codes are two-hour boosts: 2x Gold, 2x Shiny Luck, or 2x Metallic Luck. STONEHENGE is the exception people argue about, either 8 hours of 2x Gold or 2 hours of 2x Metallic Luck. Tennessee is reported as 5 hours of 2x Gold. FirstCodeEver is the string on the official description, usually described as a gold boost with no stable duration.
Use one window
- Stand in an area whose egg you can pay for repeatedly.
- Equip the pets that will break crystals during the window.
- Redeem one boost.
- Hatch until the timer ends or you have the fusion batch you wanted.
- Leave the other two-hour codes for a later session.
Whether two boosts stack is not published. Redeeming the whole active list in one minute can waste every timer on a loading screen. A failed submit can mean an extra space, the wrong case, a code already used on the account, an expired string, or the wrong experience. The game's exact error sentence is not published here.
Strings that October lists cannot agree on are not in the active table. You may try one of them a single time. If it fails, do not keep variations of the same line.
Gold boosts are less useful if you are about to rebirth without Gold Hoarder, because that community rule says unspent gold is wiped. Luck boosts are less useful if you are not hatching or mining the roll they affect.