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Steam News30 July 202620d ago

The Multi-Tank Update — 4 aquariums, offline earnings, weekly goals

The Multi-Tank Update Your aquarium just became four aquariums. This update adds multiple tanks, offline earnings, weekly goals, booster packs and 14 new backgrounds — plus a rebuilt progression curve so the full collec

In this update10

Full notes

Full ARC Aquarium update

Read the full published notes in a cleaner layout. The original post stays linked below.

What changed

7 fixes5 additions7 changes1 removal
  • Gameplay
  • Store
  • Events
  • Balance
  • UI and audio
  • Fixes
addedThe Multi-Tank UpdateYour aquarium just became four aquariums. This update adds multiple tanks, offline earnings, weekly goals, booster packs and 14 new backgrounds — plus a rebuilt progression curve so the full collection lasts.
addedMultiple AquariumsUnlock up to 4 separate tanks from the new Tanks tab in the store
addedMultiple AquariumsEach tank has its own fish capacity, so a new tank genuinely means more fish
changedOffline EarningsYour decorations now keep earning while the game is closed. Come back to a "Welcome back" summary showing what you made. Previously, being away only meant hungry fish and a dirty tank — now there is something waiting for you.
changedDaily & Weekly QuestsThree small daily goals and one weekly goal, shown in the top-right corner. They reward EXP , and there is no streak to lose — miss a day and nothing breaks. The list hides itself once everything is done.
addedShare Your AquariumUpload a screenshot of your aquarium to the Steam screenshots section. The nicest 5-10 aquariums, chosen by players and by us, will be added to a "Best Aquariums" gallery inside the game, credited to whoever built them.

ARC Aquarium changes

addedYour aquarium just became four aquariums. This update adds multiple tanks, offline earnings, weekly goals, booster packs and 14 new backgrounds — plus a rebuilt progression curve so the full collection lasts.
addedUnlock up to 4 separate tanks from the new Tanks tab in the store
addedEach tank has its own fish capacity, so a new tank genuinely means more fish
changedYour decorations now keep earning while the game is closed. Come back to a "Welcome back" summary showing what you made. Previously, being away only meant hungry fish and a dirty tank — now there is something waiting for you.
changedThree small daily goals and one weekly goal, shown in the top-right corner. They reward EXP , and there is no streak to lose — miss a day and nothing breaks. The list hides itself once everything is done.

The Multi-Tank Update

Your aquarium just became four aquariums. This update adds multiple tanks, offline earnings, weekly goals, booster packs and 14 new backgrounds — plus a rebuilt progression curve so the full collection lasts.

Multiple Aquariums

  • Unlock up to 4 separate tanks from the new Tanks tab in the store

  • Each tank keeps its own fish, decorations and background

  • Switch between tanks instantly from the bottom bar

  • Move fish and decorations between tanks whenever you like

  • Each tank has its own fish capacity, so a new tank genuinely means more fish

  • The Showcase tank is a display case: it holds your whole collection, and fish there never get hungry or sick and it never gets dirty

Offline Earnings

Your decorations now keep earning while the game is closed. Come back to a"Welcome back"summary showing what you made. Previously, being away only meant hungry fish and a dirty tank — now there is something waiting for you.

Booster Packs

Two packs — Freshwater and Reef — each give 3 random fish for less than buying them one by one. Species you have not discovered yet are more likely to appear, so packs help complete the collection instead of handing you duplicates.

Daily & Weekly Quests

Three small daily goals and one weekly goal, shown in the top-right corner. They reward EXP, and there is no streak to lose — miss a day and nothing breaks. The list hides itself once everything is done.

Fish of the Week

Every week one species is featured and sells for +75% once fully grown. The same fish is featured for everyone, so it is worth comparing notes.

14 New Backgrounds

The background collection grows from 9 to 23, and all of the existing artwork has been redrawn at full resolution.

Share Your Aquarium

Upload a screenshot of your aquarium to the Steam screenshots section. The nicest 5-10 aquariums, chosen by players and by us, will be added to a"Best Aquariums"gallery inside the game, credited to whoever built them.

Progression Rebalanced

We simulated thousands of playthroughs and found that the entire 125-species collection was being unlocked in around 7 hours — content meant to last for weeks. Levelling has been retuned so the full collection now takes roughly 150 hours to complete, with the early game left fast and rewarding.

  • You keep your level. Nothing you have earned is lost — only future levelling is paced differently

  • Quest rewards no longer let idle play outpace active play

  • Booster packs and decorations now scale properly into the late game

Quality of Life

  • Fish species descriptions are now translated in all 23 languages

  • The next species you will unlock is always shown, by name

  • New achievements for discovering 75 and 100 species

  • Notifications moved up to line up with the rest of the interface

Fixes

  • Fixed a roughly one-second freeze every time you bought a fish. The store was re-scanning the entire scene for every card

  • Fixed a rare bug that could corrupt your save. Changing the interface colour rewrote the save file unsafely — this is now atomic and backed up

  • Fixed the "Buy 100 fish" achievement being impossible to earn, and the fish-bought counter never increasing

  • Fixed dialogs occasionally attaching to a fish and drifting across the screen

  • Fixed long dialog text being cut off

  • Fixed decoration income and store prices disagreeing

Thank you for playing, and for every report and suggestion — several of the items above came directly from your messages.

Source

Steam News / 30 July 2026

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