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Big Blue
"Pack far more fish into every tank."
How do I install Big Blue?
Download the free ProjectMods desktop app, then install Big Blue for Chillquarium in one click.
</>What does Big Blue do?
Every tank in Chillquarium caps how many fish you can keep, which puts a ceiling on both your collection and your passive income. Big Blue lifts that ceiling as high as you want, so you can crowd a single tank with a whole school, line up every colour side by side, or simply stack more income-earning fish in one place. Slide the limit up to your taste and the tank updates right away. Switch it off and your tanks go straight back to their normal sizes.
</>What is Big Blue?
Big Blue lets you blow past Chillquarium's built-in tank limit and fill a single aquarium with as many fish as you like. Slide the capacity up for a jaw-dropping showpiece tank, line up every colour together, or stack more income-earning fish in one place. A free-tier mod from ProjectMods, the community-first PC mod manager.
</>Common questions about Big Blue
What does Big Blue do in Chillquarium?
Big Blue removes the ceiling on how many fish a tank can hold in Chillquarium. Normally every tank caps its fish count, which limits both your collection and your passive income. Big Blue lets you slide that limit far above the stock number, so you can crowd a single aquarium with a whole school, line up every colour side by side, or simply keep more income-earning fish in one place. The tank updates the moment you change the limit, and flipping the mod off returns your tanks to their normal capacity. It's a free-tier mod from ProjectMods, the community-first PC mod manager.
How high can I raise the tank limit with Big Blue?
Big Blue gives you a Tank Capacity slider that sets the maximum number of fish your current tank can hold in Chillquarium. You decide how far above the stock cap to go — nudge it up a little for some breathing room, or crank it way up to pack in an enormous school. The change takes effect right away, so you can add fish until the tank looks exactly how you want. Because the whole point is a bigger display and more fish earning at once, most players push it well past the normal limit. Turn the Enabled toggle off any time to drop back to Chillquarium's standard tank size.
Does Big Blue raise the limit on all my tanks or just one?
Big Blue works on whichever tank you're currently viewing in Chillquarium, and the raised limit follows you automatically when you switch tanks. So even though it targets your active aquarium, every tank you open gets the same expanded capacity without you having to set it up again. That means you can build several overcrowded showpiece tanks, not just one. Each tank keeps applying the higher limit for as long as the mod is switched on. If you'd rather keep some tanks at their normal size, just flip Big Blue off before you visit them, then turn it back on for the tanks you want to load up.
Does packing more fish into one tank earn more passive income?
Yes — in Chillquarium each fish you own contributes to your passive income, so cramming more of them into one tank with Big Blue means more money building up while you play. That's a big part of why the mod exists: the stock fish cap quietly limits how much a single tank can earn, and lifting it lets you stack far more income-earning fish in one place. It's handy if you want one powerhouse tank doing the heavy lifting on your wallet, or if you're saving toward expensive packs and new tanks. Pair it with a fully grown school and that one aquarium can out-earn several normal-sized tanks combined.
What happens when I turn Big Blue off?
Flipping Big Blue's Enabled toggle off returns every tank in Chillquarium to its normal built-in capacity, so new tanks and future additions follow the game's standard limit again. The mod is a master switch: on means your expanded Tank Capacity slider is in effect, off means stock behaviour. Because Big Blue simply changes the limit rather than altering your fish, your collection stays exactly as it was. If you've filled a tank well beyond the normal cap, it's worth deciding on your final display before switching back, since the standard limit will apply to anything you add afterward. You can toggle it on and off freely whenever you like.
What options does Big Blue include?
Tank Capacity
The maximum number of fish your current tank can hold.
Enabled
Master switch. Turn off to go back to the normal tank limit.
Big Blue is a free-tier Chillquarium mod from ProjectMods that lifts your tank's fish limit far past the stock cap, so you can pack one tank with a whole school.
What features does Big Blue include?
- Raise your current tank's fish limit far above the normal cap with one simple slider.
- Crowd a single tank with a whole school, or line up every colour of a set side by side.
- Stack more income-earning fish in one place to grow your passive earnings faster.
- Build showpiece display tanks that would never fit inside the game's stock limit.
- Flip the master switch off any time to snap your tanks back to their normal size.
Best For
- Collectors who want every colour of a set swimming together in one showcase tank instead of scattered across many.
- Idle players chasing bigger passive income who'd rather pack one mega-tank than babysit a dozen small ones.
- Screenshot fans staging a dense, colourful wall of fish for their aquarium's best photo.
- Anyone who's hit the tank ceiling and just wants room to keep adding the fish they love.
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