Grow a Garden Koi Pet
Discover how the new Mythic Koi pet in the Zen update can refund your Zen eggs as you hatch—plus tips to stack koi, gear, and mutations for the ultimate infinite-hatch strategy.
Introduction
In the latest Grow a Garden Zen update, the Mythic Koi pet introduces a groundbreaking ability: a chance to refund any non‑premium egg immediately upon hatching. No longer are Zen eggs lost forever—hatch, and you may get the egg right back in your inventory!
How the Koi Refund Ability Works
- Base Refund Rate: At level 1, each Koi has a 0.6% chance to return the hatched egg.
- Eligible Eggs: Zen eggs, past event eggs (Paradise, Bug), and any non‑premium drops.
- Limitations: Premium/exotic shop eggs cannot be refunded.
Boosting Your Refund Chance
0.6% may seem small, but you can rapidly improve it:
- Stack Multiple Koi: Each Koi adds its own chance. A team of eight at level 1 yields ~4.8% per hatch.
- Level Up: As the Koi levels, its passive refund percentage increases significantly.
- Pet Mutations:
- Gold Mutation: +10% to passive ability.
- Rainbow Mutation: +20% to passive ability.
- Pet Gear & Toys:
- XP-Boosting Gear: Level koi faster.
- Medium Pet Toy: +1.5× to passive—turn 0.6% into ~0.9%. A full team can exceed 10% refund chance!
Best Zen Egg Grinding Strategy
To maximize Zen egg refunds, follow this setup:
- Equip a team of 6–8 Koi pets with gold or rainbow mutations.
- Attach XP-gear and the medium pet toy to each koi.
- Hatch Zen eggs in bulk; after every hatch, collect any refunded egg and immediately hatch again.
- Rinse and repeat—expect roughly 1 refund per 10–20 hatches once fully upgraded.
Why the Koi Outshines Other Pets
No other pet offers a direct egg refund mechanic. While Pets like the Golden Lab or Sheba boost harvests, only the Koi lets you loop hatches indefinitely, saving you billions in Zen egg costs and unlocking infinite farming potential.
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