Chillquarium: Complete Fish Collection and Idle Guide

Game Overview

Chillquarium turns aquarium keeping into a laid-back collection and business game. You begin with a modest tank and gradually build a more impressive collection by purchasing fish packs, raising fish, and earning money from your aquarium.

The central loop is simple but rewarding: discover new fish, let them grow, decide which ones are worth keeping, and use your earnings to expand your collection. Some fish are common, while others have rare or unusual colour variants that make completing the collection a longer-term challenge.

Unlike a demanding aquarium simulator, Chillquarium focuses on accessible management and relaxing progression. Fish grow in real time, including while you are away, so you can return later to check your aquarium and collect the benefits of your progress.

The game also lets you customise your tanks, decorate your underwater space, and enjoy a real-time day-and-night cycle. Whether you want to build a profitable aquarium or simply watch your fish swim, there is room to play at your own pace.

Main Features of Chillquarium

1. Collect More Than 180 Fish Species

The heart of Chillquarium is discovering new fish. You begin with a small aquarium and gradually build a diverse collection by opening fish packs.

Each new discovery adds variety to your underwater world. Completing the collection becomes a long-term goal, especially when you start searching for unusual colour variants.

2. Raise Fish in Real Time

Fish grow naturally as time passes, even when you are away from the game. You can return later to find your fish have matured and your aquarium has continued generating income.

This idle progression makes Chillquarium suitable for short visits throughout the day rather than requiring constant attention.

3. Earn Money From Your Aquarium

Adult fish can generate passive income while living in your tanks. You can also sell fish for an immediate payment and reinvest that money in additional packs or aquarium improvements.

Deciding which fish to keep and which to sell is one of the game's most important strategic choices.

4. Discover Rare and Colourful Fish

Chillquarium includes rare and ultra-rare colour variants, including golden and rainbow fish. These unusual discoveries give collectors a reason to keep opening packs long after building a profitable aquarium.

Rare fish can also have substantial collection value, making it worth protecting special discoveries from accidental sales.

5. Open Booster Packs

Fish packs introduce new species and rarity levels to your aquarium. As your funds grow, you can work toward additional packs and expand the range of fish available to you.

Opening packs is exciting, but spending your entire balance immediately can slow your progress. A little financial planning helps you build your aquarium more efficiently.

6. Upgrade Your Aquarium

Tank capacity, additional tanks, and food-related upgrades help you manage a growing collection. Expanding your available space allows you to keep more fish while separating your favourite discoveries from those you plan to sell.

7. Customise Your Underwater World

You can arrange your aquarium and use decorations to create a tank that reflects your personal style. Some players will prefer an efficient setup designed around income, while others will enjoy creating a colourful display filled with their favourite species.

8. Enjoy Relaxing Visuals and Music

The game's gentle atmosphere, swimming fish, soothing soundtrack, and changing day-and-night cycle create a peaceful experience.

Chillquarium is designed to be enjoyed without the pressure of competitive battles, demanding missions, or complicated time limits.

Complete Chillquarium Strategy Guide

1. Start With a Clear Goal

Your early objective should be to establish a steady flow of money without spending too much on decorations or unnecessary purchases.

At the beginning, concentrate on learning the fish growth system, opening affordable packs, and understanding the difference between selling a fish and keeping it for passive income.

A simple starting plan is:

1. Open the fish packs available to you.

2. Place your fish in the aquarium.

3. Allow them to grow.

4. Compare their sale values with their daily earnings.

5. Sell suitable fish to generate cash.

6. Reinvest your profits in additional fish and upgrades.

This approach gives you a practical foundation for expanding your aquarium.

2. Understand When to Sell Fish

Selling fish is not always the same as making the best long-term decision. A fish might sell for a good amount immediately but generate enough passive income to become more valuable if you keep it.

The key is to compare its sale price with the money it earns each day.

A useful calculation is:

Payback period = Fish sale price ÷ Daily passive income

For example, imagine a fish sells for $100 and generates $10 per day. Keeping it would require ten days of passive earnings to equal the immediate sale price, assuming its income remains unchanged.

If you expect to continue playing and collecting income for longer than that, keeping the fish may make sense. If you want money immediately to purchase better packs, selling could be the better option.

Use this calculation as a general decision-making tool rather than a rigid rule.

3. Focus on Adult Fish for Better Returns

Fish become more valuable as they mature. Selling a fish before adulthood can mean missing out on the higher sale value available after it grows.

For a profit-focused playthrough, allow ordinary fish to mature before selling them whenever the additional value justifies the waiting time.

If you prefer passive income, consider keeping fish that generate worthwhile daily earnings instead.

The right decision depends on your play style. Active players generally benefit from recycling fish into new packs, while players who check the game less frequently may prefer to build a collection that earns money over time.

4. Protect Golden and Rainbow Fish

Golden and rainbow fish are among the most exciting discoveries in Chillquarium. They are rare variants that can make your collection feel much more special.

Avoid selling these fish accidentally.

Recommended precautions:

• Lock especially rare fish when the game provides that option.

• Keep track of unusual colour variants.

• Check a fish's details before selling it.

• Separate valuable discoveries from fish you intend to sell.

• Keep a personal collection of your favourite or rarest species.

Rare variants can be valuable both as collection pieces and as sources of income. Before selling one, compare its sale value with its ongoing earnings.

5. Choose Between Active and Idle Progression

There are two useful ways to approach Chillquarium.

Neither method is universally better. Active play gives you more control over buying and selling, while idle play is more convenient and relaxing.

6. Reinvest Your Money Wisely

Once your aquarium begins generating regular income, avoid spending every dollar as soon as you receive it.

Instead, consider which purchase will make the biggest difference to your next stage of progress.

Prioritise upgrades that improve your ability to manage fish, increase useful capacity, or accelerate growth. Additional tanks can also give you more flexibility when separating productive fish from new discoveries.

Decorations are worthwhile if customisation is part of what you enjoy, but players focused on rapid financial progression may prefer to invest in the aquarium economy first.

7. Use Feeding to Speed Up Growth

Feeding is useful when you want fish to mature sooner rather than waiting for natural growth.

This can be especially helpful when you are actively trying to generate cash by selling adult fish or preparing newly discovered species for your collection.

However, feeding every fish immediately is not necessarily the best use of your time. Prioritise fish that you plan to sell soon or those you particularly want to raise.

If you are playing casually, natural growth may be sufficient and lets you enjoy the game's idle mechanics without constant attention.

8. Expand Your Aquarium at the Right Time

More aquarium space gives you room to keep additional fish, but expansion works best when it supports a clear goal.

Consider whether you need space for:

• Fish that generate passive income.

• Newly opened fish packs.

• Rare colour variants that you want to preserve.

• Species you have not yet collected.

• Fish you are raising before selling.

A practical arrangement separates your long-term keepers from fish you intend to sell. This makes your collection easier to manage and reduces the chance of losing a valuable discovery.

9. Collect Every Fish Species

Completing the fish collection is one of the game's biggest long-term challenges.

You should approach it systematically instead of opening packs without paying attention to which species you already own.

Review your collection regularly and identify missing entries. When your finances permit, focus your pack purchases on the categories that can help you fill those gaps.

Rare colour variants add another layer of difficulty because collecting a species and discovering every version of that species are different goals.

Collection tips:

• Track missing species.

• Keep rare variants safe.

• Use profits to unlock additional fish packs.

• Avoid spending all your money on decorations if collection completion is your priority.

• Enjoy discoveries as they happen instead of treating every pack as a guaranteed rare-fish opportunity.

10. Balance Profit With Collection Goals

The most profitable fish is not always the fish you most want to keep.

You might find a common species that produces reliable income, a rare variant that you want to preserve, or a fish that completes an important section of your collection.

Decide what matters most to you.

If you want fast progression, favour financial efficiency. If you want a beautiful aquarium, keep the fish you enjoy looking at. If you want to complete the catalogue, prioritise discoveries and protect rare variants.

Chillquarium works well because you can combine these goals instead of following a single strict strategy.

11. Avoid Common Beginner Mistakes

• Selling every fish without checking its earnings: Some fish are more useful as long-term income generators.

• Keeping every fish indefinitely: Tank space is valuable, and low-income fish may be better sold when you need money.

• Selling rare variants by accident: Lock important discoveries before using bulk-selling options.

• Buying packs without a budget: Keep enough money available to support your next useful purchase.

• Ignoring growth upgrades: Faster growth can help if you regularly raise fish for sale.

• Overlooking tank capacity: Additional space can make your aquarium easier to manage as your collection grows.

• Expecting every pack to contain rare fish: Random discoveries are part of the collecting experience.

• Spending too much on cosmetics too early: If rapid progress is your goal, prioritise purchases that improve your aquarium economy.

Best Chillquarium Tips for Faster Progress

For players who want a quick reference, these habits provide a strong starting point:

• Check which fish have reached adulthood.

• Compare sale prices with daily passive income.

• Sell fish that are better suited to immediate cash generation.

• Keep productive fish when long-term earnings justify the space.

• Protect golden and rainbow variants.

• Use feeding strategically when you want to speed up growth.

• Expand your tank capacity as your collection increases.

• Buy additional packs when you can afford them comfortably.

• Track missing species to make collection progress more deliberate.

• Choose a strategy that matches how often you want to play.

The most important lesson is that Chillquarium is both an idle income game and a collection game. The strongest approach balances the two without sacrificing the relaxed atmosphere that makes it enjoyable.

Game Information

• Game title: Chillquarium

• Developer: Ben Reber

• Mobile publisher: Snapbreak Games

• Genre: Casual, idle aquarium simulation, collecting

• Platforms: iPhone and iPad

• Price: Free to download, with in-app purchases

• Minimum iPhone requirement: iOS 17.0 or later

• Minimum iPad requirement: iPadOS 17.0 or later

• Age rating: 4+

• Languages: English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, and Traditional Chinese

• Fish collection: More than 180 species advertised

• Main activities: Opening fish packs, raising fish, collecting income, selling fish, unlocking species, and expanding your aquarium

• Special discoveries: Rare and ultra-rare colour variants, including golden and rainbow fish

• Progression: Real-time fish growth and offline earnings

• Additional features: Aquarium customisation, decorations, a day-and-night cycle, and Game Center achievements

Optional purchases include ad removal, faster fish growth, improved rainbow odds, and increased offline earnings. These purchases are not required to enjoy the basic collecting and aquarium-building experience.

Graphics, Sound, and Atmosphere

Chillquarium takes a softer approach to aquarium simulation. Instead of asking players to manage complex water chemistry or deal with constant emergencies, it focuses on colourful fish, gradual collection progress, and a peaceful underwater setting.

Watching fish swim around the tank is part of the appeal. The gentle music and changing day-and-night cycle make the aquarium feel like a small digital retreat rather than a demanding management task.

The minimalist presentation also helps keep the focus on the fish themselves. Finding a new species or a rare colour variant becomes the highlight of a session, while aquarium customisation gives players a reason to return even when they are not actively chasing money.

Pros and Cons

Pros

• More than 180 fish species to discover.

• Rare golden and rainbow variants for dedicated collectors.

• Idle earnings and real-time growth.

• A simple economy built around buying, raising, and selling fish.

• Aquarium upgrades and additional tank capacity.

• Relaxing music and a peaceful visual style.

• Decorations and layout customisation.

• Suitable for short sessions or occasional check-ins.

• Collection goals that encourage long-term progression.

Cons

• Random fish packs may require repeated purchases to find particular species.

• Repeated buying and selling can become routine.

• Maximising income requires balancing immediate sale value against passive earnings.

• Completing the entire collection can take considerable time.

• Players seeking realistic fishkeeping systems may find the management mechanics relatively simple.

• Optional purchases can accelerate progression, although they are not necessary for the basic experience.

Is Chillquarium Worth Playing?

Chillquarium is a good fit for players who enjoy idle games, aquarium simulators, collecting games, and relaxing mobile experiences.

Its biggest strength is how it combines a low-pressure atmosphere with meaningful decisions. You can simply watch your fish and enjoy your aquarium, or take a more strategic approach by comparing income, managing tank space, and reinvesting profits.

The game also offers a satisfying collection challenge. Finding a new species is rewarding, while golden and rainbow variants give dedicated players additional reasons to keep opening packs.

Players looking for intense action or detailed aquatic ecosystem management may want something more complex. For everyone else, Chillquarium offers a comfortable balance of collecting, progression, and customisation.

Frequently Asked Questions

What is Chillquarium?

Chillquarium is a casual idle aquarium game in which you collect fish, raise them over time, earn money, unlock new species, and customise your tanks.

How many fish are in Chillquarium?

The game's mobile listing advertises more than 180 unique fish species, along with rare and ultra-rare colour variants.

How do you make money in Chillquarium?

You can earn passive income from adult fish and sell fish for immediate cash. Reinvesting your earnings in additional packs and useful upgrades helps you expand your aquarium.

Should you sell or keep fish?

Compare each fish's sale price with its daily income. Selling provides money immediately, while keeping a productive fish can generate earnings over time.

How do you get rare fish?

Open fish packs and continue expanding your collection. Rare and ultra-rare discoveries are not guaranteed with every purchase.

What are golden and rainbow fish?

They are special colour variants that are much rarer than ordinary fish. They are attractive collection pieces and may have higher sale values or earnings.

Do fish grow while you are offline?

Yes. The game advertises real-time fish growth and idle earnings, allowing your aquarium to continue progressing while you are away.

How do you grow fish faster?

Feeding fish helps speed up their growth. Growth-related upgrades can also help you progress more efficiently.

How do you complete the Chillquarium collection?

Continue opening the appropriate fish packs, track which species you are missing, and preserve important discoveries. Completing the full collection may require considerable time and repeated pack openings.

Can you customise your aquarium?

Yes. Chillquarium lets you customise your tanks with different layouts and decorations, allowing you to create an aquarium that suits your preferences.

Is Chillquarium free?

Yes. It is free to download and includes optional in-app purchases. Some purchases provide convenience or faster progression.

Is Chillquarium available on iPhone?

Yes. The mobile version supports iPhone and iPad running iOS 17.0 or later and iPadOS 17.0 or later, respectively.

Does Chillquarium support offline play?

The game advertises offline earnings and growth. Specific behaviour can depend on the version and game settings, so players should check the current version if they encounter unexpected results.

Is Chillquarium an idle game or an aquarium simulator?

It combines both. The aquarium simulation provides the visual and collecting experience, while idle progression lets fish grow and generate money over time

Final Thoughts

Chillquarium offers a relaxing way to build an aquarium while gradually discovering new fish and developing a steady source of in-game income. Its simple mechanics leave room for different play styles, whether you want to maximise profits, collect every species, or create a beautiful underwater display.

For faster progression, focus on raising fish to adulthood, comparing their sale prices with their passive earnings, and reinvesting your profits carefully. Keep rare variants safe and expand your aquarium when additional space supports your goals.

Above all, remember that Chillquarium is designed to be enjoyed at your own pace. You do not have to chase every upgrade or sell every fish to enjoy the experience. Build the aquarium you want, discover new species, and let your underwater collection grow over time.