Megaquarium/Tanks

Critical to the aquarium's success are the various tanks that hold the fish you will be hosting. Tanks come in several different types, with smaller tanks being more accessible and easier to maintain, but larger tanks can hold larger fish.

Fish tanks can generally be increased in size by clicking and dragging during placement, up to a maximum size. It is not possible to resize fish tanks once they are placed, though fish tanks can be relocated for free at any time. Items in one tank can be moved to another.

All tanks may be painted to match the aquarium's theme.

Freestanding

Freestanding tanks can be accessed by staff from any direction, and offer unmatched visibility. This oftentimes conflicts with their relatively small size, and often requires pumps to channel water to them from the equipment that maintains them.

Basic Tank

Capacity	8-18
Level	1
Research	Default
Depth	1
Cost	40

With a standard size of 2x2 and a maximum size of 3x3, the basic tank is used only at the beginning of the game when you can't afford anything larger. That being said, they are extremely cheap and extremely visible, making it ideal for holding small fish in a well-travelled area. Guests can see the tank from all sides.

Provides 2 volume per tile.

Official Description: The Basic Tank has a low capacity and can be accessed and viewed from all sides.

Lagoon Tank

Capacity	32-88
Level	3
Research	Science
Depth	2
Cost	280

A decent balance between size and depth, the medium-sized lagoon tank is sufficient for a lot of fish species. This tank does well in wide open public areas where guests can view it from multiple angles. It can generally replace the basic tank once you've unlocked it, unless space is at a premium.

Its standard size is 3x3, and can be built to a maximum size of 5x5.

Provides 3.5 volume per tile.

Official Description: The Lagoon Tank is similar to the Basic Tank but is sunken into the floor, increasing its capacity.

U Tank

Capacity	126-238
Level	8
Research	Science
Depth	2
Cost	1102

The largest freestanding tank possible, the U tank is both sunken into the floor and provides a large amount of viewing space to display larger fish. It's nowhere near as space efficient as the rounded Belfast tank, though, so it should generally be used sparingly.

Its standard size is 8x5, and can be built to a maximum size of 11x7.

Provides 3.5 volume per tile.

Official Description: The 'U' Tank is a larger version of the Lagoon Tank and is useful for filling the end of a room while the 'U' shape increases the number of viewing locations.

Wall

Wall tanks can only be accessed through three, two, or one side, but can be placed as part of a wall. Wall tanks can be much larger than freestanding tanks. Wall tanks can ideally fit in as part of a wall, with pumps and heaters out of sight on the opposite side.

Wall Tank

Capacity	10-30
Level	2
Research	Default
Depth	1
Cost	62

Intended to be integrated with walls on either side, the wall tank quickly becomes a replacement for the freestanding tanks after leveling up. This tank can only be viewed from one side, so standard usage of this tank will have equipment behind the wall and opposite the viewing angle, to prevent guests from seeing the filters and heaters maintaining the tank. Guests that see this equipment will deduct prestige.

This wall tank is notably more efficient than the standard tank, though is not as good as deep tanks. Its smallest size is 2x2, and can be expanded during construction up to 4x3, making it one of the largest shallow tanks.

Provides 2.5 volume per tile.

Official Description: The Wall Tank has a medium capacity, one viewing side and is only accessed at the back allowing you to keep your equipment out of the way of guests.

Corner Tank

Capacity	10-23
Level	2
Research	Default
Depth	1
Cost	62

The corner tank's strategy of employment is the same as the wall tank mentioned above, though this time it can be viewed from two angles instead. It is slightly less space efficient, however, as it can only be increased in size from 2x2 to 3x3, which is less space than the standard wall tank. It is easy for newer players to assume that corner tanks and wall tanks feature the same capacity, and end up overcrowding these tanks as a result.

Provides 2.5 volume per tile.

Official Description: The Corner Tank has a medium capacity, has two viewing sides and is only accessed at the back allowing you to keep your equipment out of the way of guests.

Observer Tank

Capacity	15-30
Level	2
Research	Default
Depth	1
Cost	95

The three-sided observer tank is the largest of the shallow tanks. It can be used similarly to the wall tank to capitalize on its three viewing sides, and should be able to hold small to medium sized fish.

Its standard size is 2x3, and can be expanded during construction to 3x4.

Provides 2.5 volume per tile.

Official Description: The Observer Tank has a medium capacity, has three viewing sides and is only accessed at the back allowing you to keep your equipment out of the way of guests.

Deep Wall

Deep Wall tanks are functionally the same as wall tanks, but have a depth of 2 instead of 1. These tanks require a platform in order for staff to feed the residents, and are naturally much larger and thus can be more difficult to fit in. These tanks will be the backbone of most of your mid to endgame tanks.

Deep Wall Tank

Capacity	8-18
Level	4
Research	Science
Depth	2
Cost	40

minimum size 3x2, max size 7x4

4 volume per tile

Official Description: The Deep Wall Tank has a high capacity, one viewing side and is only accessed at the back allowing you to keep your equipment out of the way of guests.

Deep Corner Tank

Deep Corner Tank
Capacity	8-18
Level	4
Research	Science
Depth	2
Cost	40

4 volume per tile

minimum size 3x3, maximum size 5x5

unlocked with deep wall tank above

Official Description: The Deep Corner Tank has a high capacity, has two viewing sides and is only accessed at the back allowing you to keep your equipment out of the way of guests.

Deep Observer Tank

Capacity	8-18
Level	4
Research	Science
Depth	2
Cost	40

min size 3x3, max size 5x6

4 vol per tile

Official Description: The Deep Observer Tank has a high capacity, has three viewing sides and is only accessed at the back allowing you to keep your equipment out of the way of guests.

Deep Outcrop Tank

Capacity	8-18
Level	7
Research	Science
Depth	2
Cost	40

4 volume per tile

min size is 2x7, max size 2x11

Researched separately from the other deep tanks Official Description: The Deep Outcrop Tank is useful in situations where you want some tanks down the middle of a room but don't have the width available for regular wall tanks.

Large

Large tanks are the biggest in the game, and can hold all but the largest animals.

Belfast Tank

Official Description: The 'Belfast' Tank has a very high capacity, curved windows, and viewing on all sides.

Small Tunnel Tank

Official Description: The Small Tunnel Tank allows your guests to get right inside the tank leading to greater levels of satisfaction.

Large Tunnel Tank

Official Description: The Large Tunnel Tank is great for dividing two areas while giving a new perspective to your Guests.

Chicago Tank

Official Description: The 'Chicago' Tank is a high capacity round-edged tank arranged in a corner configuration. It comes in two variants, depending on whether you want the viewing edge to be on the inside or outside edge of the corner.

Chicago Tank Internal

Official Description: The 'Chicago' Tank is a high capacity round-edged tank arranged in a corner configuration. This variant comes with the viewing edge on the inside of the corner.

Mega Tank

Official Description: The Mega Tank is made from Titanium Alloy and advanced polymers to give it the strength to hold a vast volume of water.

Specialty Tank

The Kriesel Tank is specific to jellyfish.

Kriesel Tank

Official Description: A Kreisel Tank has a circular current which stops the animals inside from bouncing off the sides.