How to Catch Fish in +1 Drain Water Per Click
Fish are the heartbeat of +1 Drain Water Per Click: this 1 drain water per click fish guide covers how to catch them, how the aquarium stores and sells them, which catches pay best and how mutations multiply the value of your haul. Last verified August 24, 2026.
Fishing is what makes the draining worth it
In +1 Drain Water Per Click you click to drain a pool, and the whole point of draining is what you find when the water drops. Fish spawn on the pool floor, and your 1 drain water per click fish journey is a simple loop: drain, catch, sell, refill. Every system in the game feeds that loop.
The current core loop is: Click to drain Water → upgrade water pumps → find mutated fish → collect cash and unlock bigger pools → rebirth for permanent boosts
The step-by-step fish loop
- Drain the pool. Click and let your pump multiplier drop the water level until the floor is reachable.
- Catch what appears. Fish, and the occasional mutated fish, show up as the pool empties. Pick them up.
- Store and sell. Your aquarium banks the fish, and selling stackable catches turns them into cash for upgrades.
- Move to a bigger pool. Cash buys pumps, pets and larger pools that hold rarer fish and push the loop further.
What the aquarium does for your haul
Your catches land in the aquarium shop, which does two jobs. It stores the fish you have not sold yet, and it lets you sell them for the cash that buys pumps, pets and bigger pools. This 1 drain water per click fish guide treats the aquarium as your income engine, not just a box.
The practical rule is simple: keep fishing, bank the keepers, and reinvest the cash into the next drain step. Because a healthier aquarium feeds a faster pump, which drains deeper pools, which catches rarer fish.
Mutated fish are the real jackpot
Not every catch is worth the same. A mutated fish earns and sells for a set multiple of a plain fish, which is why the best catches in 1 drain water per click are always the mutated ones you spot early.
The confirmed mutations and their value multiplier:
| Mutation | Multiplier | How to find it |
|---|---|---|
| Gold | 2x | Spawns naturally in all open pools — the most common mutation. |
| Diamond | 5x | Spawns naturally in all open pools, rarer than Gold. |
| Venom | 10x | Spawns naturally at a low rate in all pools; much more common during the Poison weather event. |
| Hole | 20x | The rarest mutation. Has a low natural spawn rate; heavily boosted during the Black Hole weather event. |
Sources: allthings.how (Aug 20 2026), techwiser.com (Aug 21 2026) — cross-checked mutation multipliers
Because Hole carries a 20x multiplier, a single Hole fish can out-earn a whole pool of common catches. Chasing mutations during weather events is the fastest way this 1 drain water per click fish guide knows to grow your aquarium income.
Fishing tips that add up
Keep the mutated keepers
Let the highest-multiplier mutated fish work in your aquarium instead of cashing them in first.
Drain faster, fish sooner
A stronger pump and a pet drain to the pool floor faster, where 1 drain water per click catch rates matter most.
Watch the weather
Poison and Black Hole events make Venom and Hole fish far more common, so fish through them.
Use the free pet codes
The active pet codes give a drain boost that reaches the fish faster. Check the codes page daily.
FAQ
How do I catch fish in +1 Drain Water Per Click?
You drain a pool with clicks and pumps until you reach the bottom, where fish spawn and can be picked up. This 1 drain water per click fish guide walks the whole loop: drain, catch, sell and refill for the next pool.
Where do I sell fish and what is the aquarium?
Captured fish live in your aquarium, where they generate cash over time and can be sold. The deeper pools hold rarer fish, and mutated fish sell for far more than the plain ones you drain up.
Which fish are worth the most in +1 Drain Water Per Click?
Mutated fish carry the biggest value. Gold is worth 2x, Diamond 5x, Venom 10x and the black-hole Hole mutation 20x, so a single mutated catch can out-earn a full pool of common fish.
How do fish help me progress?
Fish are the main source of cash. Selling and letting your aquarium fill pays for better water pumps, pets and bigger pools, which in turn drain faster and reach rarer fish sooner.
Can mutations make my fish worth more?
Yes. A fish with a mutation earns and sells for a set multiple of the same plain fish. You find them in open pools and especially during the Poison and Black Hole weather events.
What is rarer at the bottom of a pool?
The bottom of each pool is where the notable catches appear. Pushing your drain efficiency with pumps and pets is what this 1 drain water per click fish guide recommends to reach that point faster.
Should I sell every fish immediately?
Not the mutated ones. Because a mutated fish multiplies its value, keeping the highest-multiplier catches working in your aquarium grows your cash faster than cashing them in right away.
Does the fish guide work with codes?
Pet codes speed up the drain that gets you to the fish faster. The active pet codes today are listed on the codes page, and this guide treats them as a fast boost to the same fishing loop.
