Aquarium Build Guide

Quick answer: In Planet Zoo 2 an aquarium is a fully customisable habitat — not a placeable tank. You build it with the normal piece-by-piece habitat tools, set it to freshwater or saltwater, add a filtration system for water quality, and give staff an airlock to enter through. Exact build specifications are not published in a shared Frontier list.

What's confirmed about building aquariums

Aquariums are the series' first fully aquatic habitats, and Frontier has confirmed these building blocks:

Fully customisable habitat — built piece-by-piece with the same habitat tools as land enclosures
Freshwater and saltwater — two separate water types, each with its own requirements
Filtration systems — water quality is a live mechanic you manage
Staff airlock — keepers enter water habitats through an airlock
3D navigation — aquatic animals swim in full 3D, so the water body needs real volume

How to build an aquarium (the confirmed steps)

Lay out an enclosure with the standard habitat barrier tools
Set the water type — freshwater or saltwater — to match the species
Add a filtration system to keep water quality up
Add a staff airlock so keepers can reach the water
Stock it with confirmed aquatic species (see Aquatic Animals)

The in-game UI path for each step isn't published yet — these are the confirmed concepts, not a click-by-click walkthrough.

What's still waiting

Per-species water type, filtration specs, pump requirements, water temperature, space/volume and power dependency all live in the in-game Zoopedia. Don't guess these numbers from other sites.

Common problems to watch (launch-validate, not verified fixes)

aquarium filter problem
wrong salinity / wrong water type
aquatic animal stressed or dying
staff cannot enter the aquarium

These are queued for launch validation — verified causes and fixes get published only after testing.