How to Upgrade Bombs in Bomb Fishing
Bomb upgrades are the single most impactful investment in Bomb Fishing. This guide provides a session-by-session upgrade path from Starter Dynamite to Nuclear Bomb, optimized for maximum rare fish discovery and Cash income growth.
Last updated: June 2026
Why Blast Radius Matters Most
Blast radius directly determines how many fish each explosion reveals. More fish per throw means faster aquarium filling, higher passive Cash income, and more mutation roll opportunities. Cosmetic upgrades and minor gear improvements cannot match the compound returns of a bomb tier jump.
Players who hoard Cash without upgrading bombs plateau quickly. The income difference between Starter Dynamite and Cluster Bomb is dramatic — upgrade aggressively whenever you can afford the next tier.
Recommended Upgrade Order
- Starter Dynamite (default) — Replace immediately after first Cash collection.
- Standard Bomb — First shop purchase. Noticeable radius improvement.
- Heavy Bomb — Mid-early game staple for Uncommon and Rare species.
- Depth Charge — Strong underwater blast for hidden deep fish.
- Cluster Bomb — Multiple detonations for wide area coverage.
- Mega Bomb — S-tier entry point for serious rare fish hunting.
- Nuclear Bomb — Endgame maximum blast radius for Secret fish.
Funding Upgrades
Combine three income sources: aquarium passive Cash collection, active fishing sessions, and promo code redemption. The devsarecooking code alone provides 10,000 Cash — enough to skip several lower tiers if spent on a single high-impact purchase.
Read the earn Cash fast guide for session optimization techniques that fund upgrades between code drops.