How To Get Acidgrinder Rod in Fisch Roblox (May 2026) Axel’s Full Questline Guide

The Acidgrinder Rod is one of the most exciting rods added in the Venue Takeover update (May 2, 2026). It’s a high-tier rod with a deadly Acidic mutation passive and a unique Charge Meter mechanic that speeds up every catch. If you want it, you need to grind Axel’s questline inside the Underground Music Venue, and I’m going to walk you through every step.

Here’s a quick overview before we dive in:

How To Get Acidgrinder Rod in Fisch?

Step 1: Access the Underground Music Venue

Before talking to Axel, you need to unlock the Underground Music Venue. This is a hard gate — no shortcut exists.

1. Dive into a Whirlpool to enter Vertigo and navigate to Crystal Cove.
2. Place a Chaotic Enchant Relic on the pedestal inside Crystal Cove.
3. This opens a trapdoor in the shelter at the back of the cove (coordinates roughly 1350, -604, 2329).
4. Drop through the trapdoor to enter the Underground Music Venue.

Once inside, locate Axel — he’s one of six NPCs each tied to their own exclusive rod. Axel’s questline rewards you with the Acidgrinder.

Step 2: Complete Axel’s Questline

Axel’s quests revolve around catching toxic and acid-themed fish. Here’s what you need to do:

Quest 1 – Catch a Tainted Brine Phantom

The Tainted Brine Phantom is a mutated version of the regular Brine Phantom. You cannot get this through standard fishing — you need the Bloomspire: Twisted Toxins rod variant.

• Rod required: Bloomspire: Twisted Toxins (obtained from Living Garden, Toxic Grove, using a Toxic Lotus on the Bloomspire rod)
• Why it works: The Bloomspire: Twisted Toxins has a 40% chance to apply the Tainted mutation, which is what creates the Tainted Brine Phantom.
• Location: Fish in the Brine Pool area.
• Pro tip: The Brine Pool is reached by navigating through the cave past Desolate Deep. You’ll need the Reinforced Rod (or better) to survive fishing in brine liquid without snapping your line.

This is the grindiest quest. Be patient — the Tainted mutation doesn’t proc every catch.

Quest 2 – Catch a Brine Sovereign

The Brine Sovereign is a special fish that only spawns during a Brine Storm.

• Where: Brine Pool
• Condition: Brine Storm must be active — it has a 1% chance to trigger during Rain at the Brine Pool.
• Brine Storm duration: 2 minutes once triggered.
• Tip: Server hop to find a server already in Rain weather, then wait. Brine Storm applies a 50% Lure Speed debuff, so bring a high Lure Speed rod to counter it. The Bloomspire: Twisted Toxins also works here.

Since Brine Storm is RNG-dependent, this step can take time. Join the official Fisch Discord server — players often post when Brine Storm is active on their server.

Quest 3 – Catch an Acidic Caustic Storm Fish

This final quest requires you to use the restricted version of the Acidgrinder rod itself that Axel gives you mid-questline, combined with special bait.

• Rod: Restricted Acidgrinder (given by Axel after Quest 2)
• Bait: Use the specific acid bait designated for this step (check your quest log for the exact bait name).
• Location: Acid-based pool (the Acidgrinder’s 200 Durability allows it to fish in acid without snapping).
• After catching this fish and returning it to Axel, the Restricted enchantment is removed and you receive the full, unrestricted Acidgrinder.

Acidgrinder Rod Stats & Passive Abilities

Passives:

• 40% chance to apply the Acidic mutation (7.3×) on each catch — massive value multiplier.
• Charge Meter: Builds charge as you fish. Higher charge grants Progress Speed and Forced Progress Speed, slashing catch times even on Progress-Locked fish.

The one downside is low Control — your reeling bar sits at just 28% of the minigame width. Pair the Acidgrinder with a Control-boosting Enchantment to fix this weakness and unlock its full potential. You can enchant rods at the Keeper’s Altar (400C$ via Cole at the Statue of Sovereignty).

Tips to Get the Acidgrinder Faster

• Unlock Bloomspire: Twisted Toxins early. Without it, you can’t reliably proc the Tainted mutation on the Brine Phantom. Prioritize getting the Bloomspire rod from Living Garden and upgrading it with a Toxic Lotus.
• Server hop for Brine Storm. Don’t sit idle waiting. Use the Fisch Discord to find active Brine Storm servers — it saves hours.
• Bring high Lure Speed for Brine Storm fishing. The 50% Lure Speed debuff during Brine Storm makes slow rods miserable. Compensate with buffs or bait.
• Don’t rush the Charge Meter — learn it. Once you get the Acidgrinder, the Charge Meter rewards consistent fishing. Don’t let your meter drain between catches.

Want to boost your overall fishing progression while grinding these quests? Check out our guides on the Evil Sigil in Fisch Roblox and how to reach Level 1500 faster in Fisch for efficient XP and credit strategies. Also, the Celestial Waders guide is worth checking before you dive into harder areas.

Frequently Asked Questions

Is the Acidgrinder Rod limited-time?

The Acidgrinder is part of the Venue Takeover event (May 2026). The NPCs are stated to be available “for an unknown limited time,” so grind it sooner rather than later.

Can the Acidgrinder fish in Lava and Brine pools?

Yes. With 200 Durability, the Acidgrinder can fish in Acid, Brine, and Lava-based pools without snapping — one of its biggest practical advantages.

What enchantment should I use on the Acidgrinder?

Use a Control-boosting Enchantment to compensate for its -2% Control stat. This widens your reeling bar significantly and makes catching fish much smoother.

Do I need the Bloomspire rod before starting Axel’s quests?

Yes. The Bloomspire: Twisted Toxins variant is essential for applying the Tainted mutation to get the Tainted Brine Phantom in Quest 1. Get this rod first.

Where exactly is Axel in the Underground Music Venue?

Axel is one of the NPCs inside the Underground Music Venue at Crystal Cove (approximate coordinates: 2015, -645, 2460). Enter via the trapdoor after placing a Chaotic Enchant Relic on the Crystal Cove pedestal.